Skip Navigation

Alpine KTP-445A Power Pack

Compact upgrade amplifier for your Alpine receiver — 45 watts RMS x 4

| 32 questions - 62 answers

Top Seller

Item #: 500KTP445A

In Stock

Add to Cart

Ask an expert

Our VA-based experts can help.



Add to Cart

Alpine KTP-445A Power Pack


Our take on the Alpine KTP-445A Power Pack

Alpine Authorized Online Dealer

More power for your Alpine receiver

Want a simple way to kick up the power of your Alpine receiver? Alpine's "Power Pack" amplifier increases your receiver's power output to 45 watts RMS power by 4 channels — plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier.

Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.

What's in the Box:

  • Head Unit Power Pack (15A fuse installed)
  • 39" Amp-to-receiver harness (male 16-pin connector on each end)
  • 31" Amp-to-vehicle harness (male 16-pin connector on one end and a female 16-pin connector on other end)
  • 2 Brackets
  • 4 Screws
  • 4 Wire-ties
  • Installation Diagram
  • Online Product Registration
  • Limited Warranty Information

Product Highlights:


Alpine KTP-445A Power Pack Reviews

awesome system option

Michael from Harrisonburg, VA on 7/22/2014

This was a great purchase and would recommend this to anyone wanting to upgrade their stereo system.

Pros: Plug and play, easy to install. No headaches that come with a lot of products.


Really adds Punch!

Paul V from Sierra Vista,AZ on 7/19/2014

Crutchfield Customer Review (What's this?)

Really adds punch to your music, simple plug-in connections makes for easy installation. Very reasonable price for amount of watts.

Pros: Simple and powerful

Cons: None

Alpine KTP-445A Power Pack

Seth from Richmond, VA on 7/16/2014

Crutchfield Customer Review (What's this?)

Sounds great and love the simple installation...just plug and play.

Pros: Sound quality and ease of installation...

Cons: none

not just plug n play

jack from trevose,pa on 6/30/2014

Crutchfield Customer Review (What's this?)

I added the Alpine power pack amp to my alpine HD radio HU , with four new Polk audio 6.5 coaxial speakers the new sounds in my 1999 camaro are impressive for the little amount of money invested,even with the top down I still get rich powerful sound, I think a sub woofer will be my next move to add that deep bass richness we all desire.the only con to the install was the fact that it wasn't an easy plug and play as advertised, if you own a camaro with the factory Monsoon stereo you have to remove the factory amp and run all new speaker wires it was a lot more work than I anticipated ,worth it but still a lot of work!

Pros: Nice sound ,minimum investment.

Cons: Not an easy plug n play install

Powerful Amp

Clark from Searcy, AR on 6/15/2014

Crutchfield Customer Review (What's this?)

This amp connected easily to my new Alpine UTE-52BT. It is great not running the amp to the battery through the firewall. It makes a big difference in the clarity and power of the sound. I do wish it had a gain control. Works great though.

Pros: Easy installation and really boosts sound.

Cons: I think the amp would benefit from having a gain control on it.

Alpine Power pack KTP-445A

Gutierrez from Longview, Texas on 6/8/2014

Crutchfield Customer Review (What's this?)

Great addition to my CDE-151 receiver, much better sound quality, easy to install, easy to understand wiring diagram, need to replace oem rear speakers on my truck now to get full benefit of power pack, Will be getting back to you guys on rear speakers. Thanks Crutchfield.

Pros: ease of installation, great instructions, sound quality and power, great buy for the money

Cons: used double sided tape on mine also to mount directly under dash on floor board. Purchased plastic flexible conduit to cover excess wire to unit, much better look and protection of wires.

Alpine KTP-445A Power Pack

WWB III from 70774 on 6/5/2014

Crutchfield Customer Review (What's this?)

Great product, easy install, long harness came in handy to remote mount



Alpine Ktp-445A

Michael from Hartford City, IN on 5/28/2014

Crutchfield Customer Review (What's this?)

Adds a great punch to my system at an affordable pirce.

Pros: Super easy and fast installation.


Easy to use plug and play

Wildcat1 from Paducah, KY on 5/24/2014

Crutchfield Customer Review (What's this?)

Plug and play can not get any easier. Really brings life to your speakers

Pros: Plug and play, not very big

Cons: None

Small Amp With A Lot Of Punch!

Mike S. from Fayetteville, NC on 5/23/2014

Crutchfield Customer Review (What's this?)

Great addition to my Alpine CDE-153BT radio purchase. The long wiring harnesses actually assisted in my installation. Without the extra length of these harnesses, I would have had to add extension wires to my H/U wiring harness. The power and clarity my H/U produces is amazing! I wish I had installed the H/U without the amp attached first so I could compare the output of the H/U before and after attaching the amp.

Pros: Quick connects are very convenient for installing harnesses. Small footprint made installing amp in hidden location quick and easy.

Cons: Including some double sided tape with this unit would have been handy. I could not figure out how to use the enclosed brackets so I purchased some thick double sided tape and taped the unit down in its final location.

Good Stuff !

Brian H from Bluffton SC on 5/22/2014

Crutchfield Customer Review (What's this?)

Easy hook up, good power, excellent value. Wires are wayyyy too long but no big deal. All Alpine stuff makes it real easy and very inexpensive for what you get.

Pros: Good power, Easy connection.

Cons: A sub channel would be nice.

Awesome upgrade

Greg from Charlotte, NC on 5/13/2014

Crutchfield Customer Review (What's this?)

Excellent addition to my alpine radio. Runs a set of JL audio component speakers in the doors. Night and day difference. Really made these speakers shine. A must have for alpine radios to get the most out of your speakers.

Pros: Small. Mounts nearly anywhere. Just the right amount of power. Great value IMO

Cons: Got nothing

Good value amp

Gil928 from Kemah, TX on 5/6/2014

Crutchfield Customer Review (What's this?)

decent value for the money.. Don't buy this amp if you're looking for a high performance competition sound.. It did, however, upgrade my stock stereo to a very satisfactory level.. I would purchase again.

Pros: install was a snap with plug and play (paired with Alpine UTE52BT)

Cons: For my application, way too much wire. I did not want to cut and splice, so I've bundled them all together behind the dash.

Would buy again without thinking twice!

g_boy91 from Brownsville, TX on 5/5/2014

Crutchfield Customer Review (What's this?)

I took a leap of faith in ordering this little amp. I had previously upgraded all my speakers and added a subwoofer in my '02 Ram single cab. I already had a 750w RMS amp, so I didn't feel like adding another one and doing all the wiring and use power and ground distribution blocks. It's just more work and way more expensive that way. Instead I decided to add the KTP-445A to my CDE-102 headunit and I am glad I did. My rear cabin speakers are rated at 45 watts and sound great. My door speakers are underpowered by 55 watts, but sound way better than they did before. I noticed things in some songs that I hadn't heard before. I used to play my music at 21 of 35, but now I keep it at 19. It sounds punchier and louder, but clear. Once I adjusted my crossovers and other settings, my speakers blended in perfectly with my sub. Had I known about this before I would've done it sooner. I didn't know what to expect, but now I can honestly recommend this to anyone. Hardest part is figuring out where to mount the amp. Crutchfield had a great price and I recieved the package on time as promised.

Pros: Ease of installation, Reasonably priced, Convenient, Build quality, Sound quality, Compact, Noticeable improvement

Cons: Harnesses are a little tricky to plug in. You just have to play with them and wiggle them until they click.

Good power, small size.....really?

EMTJJP from Dalton, MA on 4/21/2014

Crutchfield Customer Review (What's this?)

Bought this Power Pack to go with my 143BT for the reason that I did not want to install another large amp in the back of my 4Runner (due to storing my mountain bike in the back). I will admit, I had a hard time believing that this little package was going to supply enough power to make my Infinity components sound good. Heck, I come from the days where the heat sink on your amp was twice the size of the amp itself! No more, this unit delivers the clean and efficient power that I need to keep up with my JL audio 10" DVC sub. The connection was simple, and the wires were sufficient length. My only gripe is that the connections require a little "push" to ensure they are seated. Make sure you push in until you hear the "click".

Pros: Small size, good power, easy install.

Cons: Loose connector if you don't take the time to ensure you "click" them in. No gain control on the amp. Like I said, I am old school, and am used to adjusting my amp gains. I just need to get used to not having one. Not a big deal.

Perfect amp for an Avalanche

Blaze from Morgantown, PA on 4/15/2014

Crutchfield Customer Review (What's this?)

I have a 2013 Chevy Avalanche and the back seats lay down extending the length of the truck bed which is great but does not provide any room for amps or sub woofers in the back seat. There is very little space under the front seats so this little Alpine amp fit perfectly under the center console.

Pros: It is small and easy to fit in places with little space. The harnesses were plug and play with the Alpine head unit and the custom harness that came with the Alpine head unit from Crutchfield. Wiring literally took 20 seconds. The sound range and output levels were impressive for such a small package. A definite pro is that you don't have to run separate fused power to the battery like the bigger units.

Cons: Power is 45x 4 which is not heavy duty but for the average audiophile, it is sufficient.

Nice power

lcseds from Durham, NC on 4/4/2014

Crutchfield Customer Review (What's this?)

Matched this up with an Alpine CDE-SXM145BT in my 2013 Mustang. Super install with just a few plugs. No splicing needed. This really lit things up. Good, strong power without having the normal distortion on the low end. Seems to me that as easy as this is to install, it's a no brainer to buy this for your Apline. I did not need to change any fuses either. Car electrical circuit runs this without issue.

Pros: Really adds some punch

Cons: None!

Alpine KTP-445A Power Pack

Anonymous from United States on 4/4/2014

Crutchfield Customer Review (What's this?)

Works pretty good. But at higher volumes it will make the type s speaker scream and start distorting even though they are suppose to be rated up to 75 watts rms.

Pros: Install is a breeze just plug and play only connections are to factory adapter plug which is also plug in after you are done. Size is micro small for an amp

Cons: No adjustments at all. None.

Nice addition 5 stars

David G from Odebolt IA on 3/31/2014

Crutchfield Customer Review (What's this?)

Just the right kick for my Alpine CDE-143BT. Small and easy to hide. Plug and play at it's finest

Pros: Long leads for easy locating just about anywhere under the dash.

Cons: Haven't found a con.


WarrenW from New Jersey on 3/28/2014

added to Alpine 143bt pushing Kicker KS5.25 speakers...the sound clarity is BRILLIANT. perfect upgrade for my 99 Wrangler. everything just comes alive...still can't believe the sound...just WOW

Pros: easy install plug and play small unit easy to hide easy 45 watts per channel perfect upgrade for those who want a nice little boost

Cons: none that I can think of

Little power pack

Falcon3 from Atwater, CA on 3/19/2014

Crutchfield Customer Review (What's this?)

Lot of clean power in a compact package

Pros: Compact size, real clean power, easy to wire up

Cons: None

Great Sound

F from Dallas on 3/12/2014

Crutchfield Customer Review (What's this?)

Purchased two units, one for my car and one for my daughter's car. Sound quality is excellent. Installation very easy. Had to return one of the units for a low level hum that developed after it was powered on about 10 minutes that could be heard when the volume was lowered to zero. Crutchfield replaced it with free shipping - awesome customer service! I have owned many Alpine products through the years and this is the first problem I have ever had - plan continue to buying Alpine products in the future.

Pros: Great sound, build quality - awesome customer service from Crutchfield.


Awesome unit

Anonymous from Battle Mtn, Nv on 3/4/2014

Crutchfield Customer Review (What's this?)

If your alpine is new enough to use the power pack buy it! Well worth the money, I would buy it again with out a second thought, it has just enough power to keep the door speakers up with a sub, and its clean power and such a easy install!

Pros: Easy install, lots of power for such a small unit, plug and jam lol!

Cons: None if your thinki,g about it just get it, no regrets here!

Little amp good sound

Michael from Canyon Tx on 2/28/2014

Crutchfield Customer Review (What's this?)

I needed just a little more power out of my Alpine head unit but I am very limited on space in a jeep TJ. This fit the bill perfect

Pros: Small size, easy to install

Cons: Included harness is a little long

Alpine KTP-445A Power Pack

mark ny from Poughkeepsie, NY on 2/24/2014

Crutchfield Customer Review (What's this?)

Great little amp more than twice the power my head unit was putting out. .really helped the bass out...just plug in and go doesn't get any easier than that



Couldn't have been a better product for what I needed

Josh from San Diego on 2/17/2014

Crutchfield Customer Review (What's this?)

Great product for my needs. I just needed a small amp to power the speakers I installed in my wrangler and this was perfect. I'm no car audio expert so the plug and play set up was ideal, and the result in the sound was well worth the money. It's small in size so you can easily conceal it, and the wiring is plenty long to put it in just about any location.

Pros: Plug and play, size, performance, and the price is reasonable.

Cons: It would be nice if it was a little more powerful

Love the Amp

Chrisafd from Averill Park, NY on 2/14/2014

Crutchfield Customer Review (What's this?)

Love how the amp help the sound of the system

Pros: Simple to install Great sound Wiring very simple

Cons: Wish that the price was lower

Alpine Power Pack

Randy from Chapel Hill, NC on 2/10/2014

Crutchfield Customer Review (What's this?)

Easy install. Great sound

Pros: Subtle music quality improvement. Easy hook-up. Very nice to not deal with extra batt.- power wire. Or ground!

Cons: Too much and too long wiring harness's for placing behind head unit. Almost did not fit cause of bulky wire overlapping.... Optional short wires would be appreciated !

Alpine KTP-445A Power Pack

Aloha808 from Hawaii on 2/4/2014

Crutchfield Customer Review (What's this?)

Very satisfied with product, got this pushing alpine type s components in the front and coaxials in the rear and they scream....



awesome little power pack!!

Jerry from Mount Vernon, Ohio on 2/3/2014

I have to say it packs a nice little punch for running your basic speakers in your system,

Pros: easy to install, supplies plenty of power for your highs

Cons: none

Install A Snap

Don R. from Columbia on 1/21/2014

Crutchfield Customer Review (What's this?)

Great little amp for adding some umph to you music. Install is a snap! " Snap here snap there Done! Now I have to upgrade my Alpine HU to take advantage of the low pass high pass crossover.

Pros: Increase in sound clarity. Easily to install.

Cons: None


JODY from MENDENHALL,MS on 1/19/2014

Crutchfield Customer Review (What's this?)



Cons: NONE

Please read

ACE from Muscle Shoals, AL on 1/18/2014

I installed this with an alpine 149bt. The 1st unit from alpine was doa. The second had a high pitch whine that I'm certain is picking up noise from the fan in the alpine head unit. It sounds fine but cuts out well before clipping. The head unit power is cleaner all the way up to distortion. I tried running extra power and ground but nothing helped. I think this unit would work better with a lower powered head unit. I have been installing for years and love alpine, but this one didn't work out for me. Will install a normal 4 channel amp from alpine. Just dread the wiring. Ugh.

Pros: Very simple installation

Cons: Did not match well with the alpine 149bt

Little extra Oomph

A Mitchell from Long Island NY on 1/17/2014

Crutchfield Customer Review (What's this?)

Competent piece of equipment. Not going to shake the car apart. Will help at highway speeds and loud metro areas. Made idiot proof ( note oem radio fuse MUST be 15 amp) , install takes no time at all, just wire routing in dash.

Pros: Simple, Simple install. Small form factor. Long wires (con to some)

Cons: None

Easy Upgrade

RO from Rockford, IL on 1/10/2014

Crutchfield Customer Review (What's this?)

Easy to install and hide. Adds much better power to my Alpine head. It's not a 'monster' amp, but I was not expecting it to be either. I read many of the reviews here prior to purchase and had a pretty good idea what to expect. Of course now it has me thinking I should add a small sub in my truck.........

Pros: Economical, easy to install, nice power boost

Cons: none

Easy as pie.

MDS from San Luis Obispo, CA on 1/2/2014

Crutchfield Customer Review (What's this?)

Easy to install, easy to hide. This is a sweet way to bring a bit more boom to a basic installation for a minimal investment!

Pros: So easy a caveman can do it.

Cons: none?

Great amp

Anonymous from Navarre, Florida on 1/1/2014

Crutchfield Customer Review (What's this?)

Excellent amp combined with an alpine unit. Fits in a small space and wires into the radio with ease. Makes the alpine unit sound better than a new high end car radio.

Pros: Small, good sound quality.

Cons: Amplifies some white noise.

Alpine KTP-445A amp

Brandon B from Charlottesville, VA on 12/28/2013

This was purchased for me as a Christmas present at the Crutchfield store in Charlottesville. The new store is pretty cool with basically a touchscreen version of the website on every display table. It makes it really easy to compare product specs. The salesmen are attentive but not too pushy. My only knock of the store are that it doesn't come close to displaying all their available items, and you can't test most of the stuff (including speakers) out. Installation of the amp went pretty well. It's as easy as pulling out your head unit, unplugging it from the car, finding a good spot for the amp, then wiring the amp between the head unit and the car. It took me about 30 minutes total. 20 minutes of that was spent wedging the amp into a very tight spot behind the dash. Installers beware - the plugs on the wiring harnesses do not fit securely, that is, they don't "click" in, I had everything reassembled after testing only to find that my signal was going in and out due to a poorly connected harness. The sound is a huge improvement over my HD137BT's internal sound. I guess my speakers were actually capable of much more. The sound is richer, the bass fuller and less prone to distortion. The best part is how much better it sounds at low volume. I found myself turning up the volume before just to get more bass. Not necessary now. Overall, I'd say the power pack is a great value, especially if you don't want to get into a much more complex install involving a traditional amp.

Pros: Ease of installation Small Size Ample supplied wiring clean sound

Cons: Connectors do not click like you would expect


John F from Stratford CT on 12/20/2013

Crutchfield Customer Review (What's this?)

easy to hook up.

Pros: Plenty of power for me.

Cons: none

Alpine Power pack Amp

DanF from Charlotte, NC on 12/20/2013

Crutchfield Customer Review (What's this?)

Already had Alpine receiver in so connection was incredibly easy. Added power makes the Polk Audio 6.5" speakers perform well.

Pros: Easy install. Instant power increase over factory receiver.

Cons: Nothing wrong with product or directions. Feel like better tech support after purchase of Alpine receiver would have eliminated this purchase.

Alpine KTP-445A Power Pack

klus from tamaqua pa on 12/17/2013

Crutchfield Customer Review (What's this?)

great addition to unit

Pros: none

Cons: none

Fantastic Little Amp

NickS from San Clemente, CA on 11/15/2013

Fantastic little amplifier; Installed with the Alpine CDE-143BT in a 2010 Ford Focus SE running the stock speakers (no stock sub). I didn't test the setup without the amp, but at the moment I only need to turn the receiver up to about 10 volume wise to achieve great sound, at a volume loud enough to distinguish vocals from outside the car with the doors closed. I had to run the this through a PAC C2R-FRD1 before outputting to the speakers, but so far the adapter has had no compatibility issues and runs perfectly.

Pros: Small, Mountable virtually anywhere, 45Wx4 with no connections other than to the back of the radio!

Cons: There is at least a foot, possible more of spare wire on each side, but in some cases this may be a pro.

Alpine KTP-445A Power Pack

Anonymous from Torrance, CA on 11/11/2013

Crutchfield Customer Review (What's this?)

Great amp for being small. Very easy to install and hide

Pros: adds a lot of sound for a small amp. Small, easy to install


Alpine KTP-445A Power Pack

J from Tyler, Texas on 11/4/2013

Crutchfield Customer Review (What's this?)

Works great with a nice clean sound. I hide the amp under the dash of a Jeep Wrangler JK.

Pros: I attached this to a Alpine head unit. I could not have been easier to install.

Cons: None

Alpine KTP-445A Power Pack

Mike F. from Temecula, California on 10/28/2013

Crutchfield Customer Review (What's this?)

Easy install... plug and play!

Pros: Plug and play with supplied wiring harness. Powerful wattage driving to your speakers.

Cons: None so far!

Alpine KTP-445A Power Pack

Eric M. from Lincoln Ne. on 10/27/2013

Crutchfield Customer Review (What's this?)

Stupid easy to install!!!!!!!!!

Pros: Provides plenty of power without pissing off the neighbors because your rattling their pictures on the wall.

Cons: Now I have to come up with the money to buy a set of 8 inch low profile subwoofers to put under the front seats of my 04 Dodge Dakota club cab

Great little amp!

Richard from New York, NY on 10/14/2013

Crutchfield Customer Review (What's this?)

Great little amp! I was in the market to upgrade my factory sound system in my car and didn't want to go crazy with amp wiring, etc, etc. Upon opening the box I was still shocked at how small this amp was. Due to this I was able to easily locate it on the inside drivers side part of my Civic's dash board with zip ties. I did not want to use the little mounting brackets because they just weren't the best option for me. Powering 4 Polk 6.5 coaxials this little amp works these speakers out! Sound is great!

Pros: Small package, great sound, easy installation.

Cons: None for me

A little more...oomph!

PurplePTGT from White Lake, MI on 10/8/2013

Crutchfield Customer Review (What's this?)

I installed a CDE-HD149BT head unit and initially I was going to send this amp back because I thought it wasn't needed. Then I decided to try it and well, it's a keeper. It doesn't add appreciably to the noise or distortion and it provides about 3dB more output than the head unit alone. This is just what I needed to get that little extra oomph. The installation couldn't be easier. It's literally plug and play...LOUDER! lol

Pros: Reasonable cost and a no-brainer installation.

Cons: No nits to pick here.

Good product

Anonymous from Mn on 9/29/2013

Crutchfield Customer Review (What's this?)

Good amp for its size works only draw back is high inputs makes it sensitive volume

Pros: Easy to hook up convenient amp

Cons: None

Works as expected

CRD from MS on 9/21/2013

Crutchfield Customer Review (What's this?)

Easy to install. I hid mine behind the carpet in the passenger floorboard up near the dash. I didn't try out the Alpine 143BT head unit before installing this so I am not sure of the amount of improvement. The sound is nice and full.

Pros: Plug and Play


All alpine

EDDENTON from KANSAS on 9/20/2013

Crutchfield Customer Review (What's this?)

Compact amplifier is simple to install and works great. Uses the same power as the Alpine receiver. Not overly powerful (45 Watts/channel) but adds a lot of dimension to the sound. I get much more out of my MOMO speakers.

Pros: Super easy to install. Made to work with many Alpine receivers.

Cons: Low power. No "thumping" bass (but I don't really need that anyway, not trying to wake up the neighborhood).

great sounding amplifier

RandyT from Tupelo, MS on 9/10/2013

Crutchfield Customer Review (What's this?)

Super simple installation with plenty of wire length. Absolutely clear sounding with plenty of amplification.

Pros: Ease of installation. Clear sound. Great amplification.

Cons: None.

Alpine's KTP-445A

Mike from Sanger, CA on 9/5/2013

Crutchfield Customer Review (What's this?)

Makes my Alpine CDE-147BT sound that much better. I tested first by having my HU powering all my Alpine speakers in my Silverado, and then adding this plug-n-play pack. I hear the difference. Sounds louder at a lower volume level, and when I turn it up- the sound is clean and much clearer than just powering my speakers off of the HU. I know it's do to the fact that my aftermarket speakers need more RMS power, and this unit does it. But amplifying your speakers with an external amp(other brand) doesn't guarantee that they'll sound good. With this addition, it reassures me that I'm getting the best sound out of my speakers. An I can say that, because I can tell. An yes, I'm sure the sound coming out of the HU would of been fine, but adding this power pack makes my music experience that much better! Also , the cost to amplify the sound out of your speakers with this unit is less expensive than to have to buy: a amp(costs more), wiring kit, RCA cables, and maybe a new battery terminal to connect the power gauge wire to the amp from the battery. An at the end- the headache of installing and running power wires to a amp with a vehicle that might not be so installer friendly.

Pros: 45 watts RMS power by 4 channels, with very easy installation. Clean sound at any volume level. If you can install a reciever in your vehicle, you can install this!

Cons: Depending on where you going to install this unit, you might find that you have way more provided cable than needed. Zip tie and tuck rest of the wiring out of the way. Funny, because it's the only "con" I could think of.

Alpine KTP-445A Power Pack

Anonymous from wilson nc on 9/4/2013

Crutchfield Customer Review (What's this?)

great little amp easy install



big sound, little box!

JoeyW from Dallas, TX on 9/2/2013

Crutchfield Customer Review (What's this?)

I thought my alpine unit (CDE-145 BT) had good sound with my speakers (Kenwoods in the front Infinity Reference) in the back, but this little baby gave those same speakers some pop! Now I don't have to crank them up just to hear subtle notes bot when I want to crank it, I got clean, crisp, clear rockin' sound. This little baby will NOT disappoint.

Pros: easy to install, plugs right in the Alpine units; no extra wiring; long enough wiring to remote mount.

Cons: none I can think of

Great product!!

Anonymous from East Wenatchee on 9/2/2013

Crutchfield Customer Review (What's this?)

The size is great. Fits just about any where. Plug and play makes it super easy.

Pros: Size and plug and play

Cons: None

Alpine KTP-445A Power Pack

chuck m from nevada on 8/24/2013

Crutchfield Customer Review (What's this?)

I bought the alpine head unit cde-143bt to replace an old pioneer deck and wanted to try a little more power to push my 6 polk speakers that didn't have good sound quality with my sub. this small unit was everything I dreamed of without buying a big amp.. this little amp has brought my polks alive !!! the sound is perfect even pushing 6 spkers. the polks have punch to them now and beautiful sound quality. I am done !!! I have an suv with 2 dash spkers and 4 61/2 door spkers. I also have an amp and 12 inch ported sub. I'm 58 and a music lover and this is the best sounding unit I have ever had ! the great sound comes through with any kind of music! the power is there now. thank you for the great service and all the advice over the phone. your advisors need to listen a little better though. I had to splice my new deck in because he said I shouldn't need anything since I had a pioneer being replaced. no problem though. the install went great and I am very pleased. thanks again.

Pros: drives 6 polks with no problem. power and sound quality is great

Cons: way to much wires to stuff up in my dash, but I see why alpine has it.

This amp rocks.

Kevin from Kerrville, TX on 8/21/2013

Crutchfield Customer Review (What's this?)

I decided on this amp because I wanted something that would give me a good boost in sound, with minimal hassle. This amp does exactly what you'd think. It gives me clear, distinct sound from my front & rear aftermarket speakers. The separation between channels is great, the bass and highs are much more vibrant than before at both low and high volumes. If you're looking for a nice addition from a great company at minimal cost, I would definitely recommend this amplifier.

Pros: Cost, ease of installation, Alpine name, Sound quality.

Cons: None

Awesome from Ashburn, Va on 8/21/2013

Crutchfield Customer Review (What's this?)

Easiest amp I have ever installed

Pros: Nice power as soon as you turn it on. Easy pass through install.

Cons: nothing!

Alpine KTP-445

Gb from Maryland on 8/20/2013

Crutchfield Customer Review (What's this?)

I own an Alpine head unit that needed a little more umph to push the 6.5 components in the front doors, along with the alpine 6.5's in the rear deck. The alpine sounded pretty good alone, but with the addition of the KTP-445, wow, what a way to wakeup the sound and definition of the music, with moderate volume.

Pros: The clarity and power in such a small package is amazing. I just plugged it in, and was done.

Cons: none

Alpine KTP-445A Power Pack

jason from alabama on 8/12/2013

Crutchfield Customer Review (What's this?)

its worth the money spent, they make your speakers sound awesome, and its very easy to install, I put it in my 05 ford focus and paired it with alpine 5x7 speakers makes them sounds great lots of bass



Great little amp

Rob from Reno, NV on 8/8/2013

Crutchfield Customer Review (What's this?)

very easy to hook up, specially with an alpine deck.

Pros: Easy hook up, compact and good clean power.

Cons: No gain control.

Alpine KTP-445A Power Pack

Anonymous from Dallas, TX on 7/22/2013

Crutchfield Customer Review (What's this?)

Nice addition for Alpine in-dash receivers. Really make my JL Audio speakers drive.



Alpine KTP-445A

Brad from Colorado on 7/17/2013

Crutchfield Customer Review (What's this?)

Recently installed the KTP-445A and it sounds great. Very easy to install and the sound has come to life. A very noticeable difference and well worth the money.

Pros: Small and fits in the dash easily. Sounds great, big improvement.

Cons: None

Great bang for your buck!

Anonymous from Manteca, CA on 7/16/2013

Crutchfield Customer Review (What's this?)

Very impressive sound from this amp installed with Alpine CDE-134BT head unit. The combo is powering Polk audio db651's in my front doors and Polk db461's in the rear pillar of my 99 GMC Sierra Reg Cab. Sound is very clear and loud. Install was easy with included parts from Crutchfield.

Pros: Great quality, easy install, inexpensive.



Garry from Canton,Ohio on 7/4/2013

Crutchfield Customer Review (What's this?)

My wife wanted it LOUD! So I ordered this to go with her Alpine 137bt. All I can say is WOW is it LOUD. For the price and it's a class D amp that you can fit in the dash. Awesome Amp.

Pros: I'm powering 4 6X9's with the Alpine KTP-445A Power Pack and it's more power then needed for them.

Cons: none!

Power punch

Otto from Bradenton florida on 6/29/2013

Crutchfield Customer Review (What's this?)

Great little amp with plenty off power to rock your ride.i love how small this amp is it fit right behind my Alpine head unit.I also like how it plugs right into the head unit with no extra cables to run. The amp cranks out nice clear distortion free power it fill your ride with quality clear music. I would Definitely recommend this amp.

Pros: Gives your head unit a lot more distortion free power Size Ease of installation

Cons: Cables are a little to long

AmaIng difference in clarity

Eric S. from Arkansas on 6/28/2013

Crutchfield Customer Review (What's this?)

I will start this off by saying i have been a car audio enthusiast for 17 years. Have bought and used every brand, size, shape of stereos, speakers, subs out there. Havent been in the scene in a few years and decided to get back intoit but with a more grown up aproach this time, so. Opted for an 8" fosgate punch 2 subwoofer, memphis coaxials front and rear, the sub over powered the mids and highs even tho its an 8, wantd something to blend the rest of the system to the sub without goin crazy and buying another amp, this thing does that just perfect, not a huge impact as of i added processors and kultiple external amps, but a difference that anyone with an ear for sound can tell, the clarity this alpine amp provides to the memphis coaxials is amazing, the depth is there like it should be, clean, clear, crisp is what you should expect out of a set of aftermarket speakers and thats what alpine has done with this little beauty, and the ease of installation is well, just that, easy, unplug radio harness, plug into harness for amp, take the other harness on amp, plug into radio, simple as that. Zip tie or screw unti to something stable, and bam, you are done, thanks alpine for an awesome product, and thanks Crutchfield for the fast delivery!

Pros: Easy install, superb clarity

Cons: Nothing!


P from Huntsville, AL on 6/25/2013

Crutchfield Customer Review (What's this?)

This is the easiest amp you will ever install. Probably not the best sound quality but its better than no amp.

Pros: Easy to install

Cons: None

Alpine believer

Zane from Huntsville, AL on 6/19/2013

Crutchfield Customer Review (What's this?)

My Alpine head unit just didn't have the power to drive /match my 10-inch bazooka sub. I really didn't want to downsize the sub and my technical expertise does NOT extend to a full up amp installation. So, imagine my joy when first reading about this Alpine add-on amp. It took me about 30 minutes to install (mainly because running the wires had to go through tight spaces behind the dash of an 06 Honda Civic Si hatchback). The unit fit neatly behind the dash. It is so small that I was able to install it with a piece of extra strength Velcro. The sound difference takes a bit of getting used to; by that I mean, there is not an overwhelming change BUT adjustments to the bass and treble are more noitcable and the volume can be set at "9-11" instead of "18-21". This allows the head unit to urilize the "Loudness" function providing a richer, full bodied sound.

Pros: Small size. Ease of installation. Plug and play installation for compatable head units. Price.

Cons: Can only be used with Alpine units (?)

Alpine KTP-445A

NeilH from Hartwell, GA. on 6/17/2013

Crutchfield Customer Review (What's this?)

Sounds great and could not be easier to install.

Pros: Easy install, very compact and better sound quality at lower levels.

Cons: None

great addition

Chris M from Granite Falls, Washington on 6/16/2013

Crutchfield Customer Review (What's this?)

Great addition to my CDE-102 head unit. It drives the MTX 6 1/2 Terminators separates quite nicely. Super clean sounding

Pros: great sound

Cons: to much wiring for under dash install.

Awesome upgrade here

Watson from Leominster,ma on 6/10/2013

Crutchfield Customer Review (What's this?)

Big difference in sound quality and deepness.

Pros: Everything

Cons: Nothing

Alpine KTP-445A

GlennH from Ocala, Fl. on 6/4/2013

Crutchfield Customer Review (What's this?)

I waited a while for this unit to become available and am glad I did. The speakers I bought are very efficient but an external amp helps them sound their best especially at lower listening levels. This amp with it's plug and play feature was very easy to install and gives me plenty of oomph and kept me within my budget. If you're considering an Alpine head unit, you won't regret adding this amp.

Pros: Easy plug and play install and small enough to place almost anywhere. Does what it says.

Cons: None.

Alpine power pack ktp-445a

Michael from Portsmouth NH on 6/1/2013

Crutchfield Customer Review (What's this?)

What a great item for someone that is looking just to have a better sounding stereo without over the top Amps.

Pros: Easy to install and hook up. Plug and play.

Cons: None

perfect for my needs

Patrick from concord, nh on 5/27/2013

Crutchfield Customer Review (What's this?)

I bought this amp to go with an Alpine head unit to install in my 61 Buick. It has all the power I need, and is extremely clean in delivery with a wide range of music. The compact size makes it easy to locate, and it looks & feels like a quality component.

Pros: Very clean sound offering plenty of power at a budget price.

Cons: The attachment points do not offer much flexibility for mounting.

Not necessarily louder, but "better"

Ezra from Broomfield, CO on 5/24/2013

Crutchfield Customer Review (What's this?)

Received the unit sooner than expected due to it being backordered - a nice surprise. Very nice build quality; all-metal construction, heavy enough to say "I represent quality", but not so heavy as to be unwieldy. Wire harness connectors leave a little to be desired - they came loose during testing. Make sure they're seated firmly as they don't "click" as obviously as you might expect. Otherwise, installation is ridiculously simple: Unplug the wire harness from the back of the head unit and stick the power pack in between that connection, using the cables that came with the power pack. Then figure out where you're going to hide the power pack and cable-tie the excess wire length. You're done, unless your deck isn't Alpine; then you'll need to splice a few wires. On volume: Prior to installing this power pack, turning up my Alpine CDE-HD149BT beyond 15 was a little straining on the ears; turning the head unit up beyond 18 was just plain uncomfortable. After the install, everything just sounded... better. Less ear fatigue when listening at higher volumes! On quality: Cleaner, crisper sound... it even sounded a little brighter than before, and that's with factory 6.5" door speakers and 1" tweeters. I didn't need extra volume, but I can hear a clear difference in quality and clarity that simply wasn't there before. And it's nice to know I can get the added volume when I want it, such as when leaving the doors open when working outside.

Pros: - Well-built and attractive - Small, fits almost anywhere (Mine went into a space inside the dash, under the head unit.) - Increases maximum volume - Improves sound clarity, which reduces ear fatigue at higher volumes - Literally "plug and play" - comes with everything needed, assuming you have an Alpine deck. If not, splice a few wires and you're done. - No need for complex door speaker amp installs; this is only 5 watts less per channel than a 4-channel amp, and FAR easier to install!

Cons: - Cable length was about 2-3 times longer than I needed for my install... but this is a good thing for some installs, and it comes with cable ties and mounting brackets in case you need them. Not a real "con" in my book.

KTP-445A - Early Impressions

Don L from Northeast Ohio on 5/21/2013

Crutchfield Customer Review (What's this?)

Got my new KTP-445A yesterday via UPS - as usual, very quick shipping by the good folks at Crutchfield. After working hours, I was able to install the unit in my 2007 Jetta Wolfsburg, connected to my CDE HD137BT in <15 minutes, including the time required to disassemble/reassemble the dash. The unit fit behind the radio without issue. I was pleasantly surprised when I shut the doors and "test fired" the new configuration - not massive volume boosts, but I was able to get considerably more volume before audible distortion after the installation. 18W to 45W per channel in 15m - amazing. Overall an amazing buy and a worthwhile investment for my humble audio system. I don't necessarily need (or want) it bone rattling loud - just clean with good frequency response across the board - this amp delivers that cleanly, accurately and with minimal installation efforts.

Pros: Fits most anywhere Long harness leads Solid locking connectors Easy installation Great clarity

Cons: No more adjustable levels (though I'd have probably run them at max output and let the HU make the changes...)


Hands-on research

Product Research


Overview: The Alpine KTP-445A Head Unit Power Pack is an easy-to-install power upgrade amplifier that allows you to add higher output and more dynamic response to your Alpine head unit. The KTP-445A amplifies your Alpine head unit's power output, resulting in a 150% power increase over the original power from the head unit's built-in amplifier.

  • Because of its high-powered amplifier design, the Alpine KTP-445A does require that a separate +12V constant power wire is run to the battery with a separate inline 15A fuse in vehicles with lower than a 15A fuse protecting the factory radio. Check out the "Accessories" tab for wiring kit.
  • This Alpine high-powered amp won't work in systems where an outboard factory amplifier is still active. If used in vehicles with a factory amplifier, the factory amp will need to be completely bypassed (this may result in lost speaker channels, if factory amp has more than 4 channels).
  • The increase in power may result in a louder warning chime in certain vehicles.

Compatibility: The KTP-445A connects to any 2005 and newer Alpine head unit that has a black 16-pin wiring harness. Please check with your Crutchfield Product Advisor to confirm compatibility.

45 Watt x 4 Channel Amplifier: The Alpine KTP-445A Head Unit Power Pack employs a 45 watt x 4 channel amplifier. The amplifier offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result is a 1 Watt Signal-to-Noise Ratio of 82dB or better. Uniquely, the amplifier distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion.

  • CEA-2006 Power Rating: 45 watts x 4 channels (at 4/2-ohms, 20-20kHz, 1% THD)
  • Max Power Output: 90 watts x 4 channels (Peak)

Note: The specifications given by Alpine for the built-in amplifier comply with the CEA-2006 mobile amplifier power testing and measurement standards from the CEA (Consumer Electronics Association). All manufacturers who comply with the standard can display the CEA-2006 logo on their product.

Installation: Since the KTP-445A is small and compact, it installs behind your Alpine head unit in the dash of most vehicles. Installation is simple with no special tuning. The 39" grey connector harness plugs into one end of the Head Unit Power Pack and connects to the rear plug on your Alpine head unit. The 31" black connector harness plugs into the other end of the Head Unit Power Pack and connects to your Alpine receiver's harness (included with your Alpine receiver). You will need to splice or crimp the wires from the Alpine receiver's harness to a Crutchfield vehicle harness adapter (sold separately).

Note: The factory radio circuit needs to be a minimum of 15A. If it is not, a separate power and ground will need to be installed for the KTP-445A

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

excellent reviews. Norm also highly recommended Norm's Bio: [ Michael L.  Aug 12, 2016 ]
more power [ Hans  Aug 10, 2016 ]
Good reviews [ jesse  Aug 02, 2016 ]
To boost my new Alpine Headunit's power. [ TexasRedfish  Jul 31, 2016 ]
A former manager at local stereo shop spoke highly of Alpine and this little amp so when I decided to buy a new stereo for my new peterbilt I decided to give it a try ... I like the idea of how small and easy to install it is [ SEAN  Jul 12, 2016 ]
was told works with system didnt [ Roger  Jul 08, 2016 ]
I put one in my Saturn, boosted the sound of the JBL speakers. so why not do the same to the Ranger. [ James G.  Jul 06, 2016 ]
Good quality [ TIMOTHY  Jul 06, 2016 ]
ease of installation [ Michael  Jul 05, 2016 ]
Cheap upgrade for high quality and powerful sound. [ AARON J.  Jun 21, 2016 ]
Just enough added power to stop road noise when bombing down the highway as well boost clarity and volume even at low volume settings. Plus, i can install this vice paying someone to install and outboard amp. [ richard  Jun 04, 2016 ]
Power those speakers to full potential [ Zachary  May 30, 2016 ]
Compliments stereo for optimal sound. [ Scott  May 14, 2016 ]
Because I have an Alpine deck and like the way this just plugs into it. [ Dave  May 12, 2016 ]
Installed one of these beauties for a friend... man, night and day difference as far the Type R 6.5's are concerned. [ Henry  May 06, 2016 ]
I picked the KTP-445A Power Pack because it is a direct connect to my INE-S920HD receiver. Easy install no wires to spice. [ Bill  Apr 27, 2016 ]
Hopefully this will help with my aftermarket door speakers and alpine head unit. I have not recieved it yet but will post a better review when it arrives at my chateau. [ Travis  Mar 31, 2016 ]
Needed a little more power for the Alpine head unit to push the new speakers. Easy install and it's Alpine!! [ CHRIS  Mar 26, 2016 ]
Looking to boost my Alpine stereos performance . This Amp is plug and play for my stereo and is compact . [ Charles  Mar 11, 2016 ]
It was an easy to install amplifier that gave the Alpine head unit a little more punch with the factory speakers. [ Evan  Feb 29, 2016 ]
Hope to boost power of new HU [ Keith  Feb 27, 2016 ]
plug and play power with an alpine 16- pin harness [ Anthony  Feb 24, 2016 ]
Advice of your advisor. [ Steve  Feb 22, 2016 ]
I wanted to boost the RMS power output of my new receiver without needing to add a large amplifier and the wiring work that would be required for it. [ Michael  Feb 21, 2016 ]
Extremely compact, powerful sound, and super easy to install. [ Mark  Feb 18, 2016 ]
Purchased and used one prior and I really loved how it woke up a mid-range radio with 4V out and good mids/highs. Stashes nicely once you trim down the VERY long leads which are included. Doesn't get hot at all even if stored in a tight spot, even in a car known to just breath engine compartment air over the unit and into the cabin ('95 Miata). Now installing in an '02 Jeep Liberty with JL VR components and ditching the brick under the seats. [ Wingnut  Feb 17, 2016 ]
Needed to power the speakers to their full potential. [ bruce  Feb 03, 2016 ]
I have two alpine receivers that this product will work with. [ Cordie  Jan 23, 2016 ]
I usually don't amp my door speakers because I never turn my deck volume up past half way. 18w RMS is loud enough and I don't need to be heard 3 blocks away. However I agree that 18w RMS isn't enough to get the full potential out of a speaker. I chose this amp because it is a easy install inline with an Alpine deck not requiring power and ground cables and running or splicing speaker wire to the door speakers. [ Mark  Jan 18, 2016 ]
My entire system is alpine i want more power for my system for the summer [ Robert  Jan 10, 2016 ]
Small. Cute. Puts out power. [ Blaine  Dec 27, 2015 ]
Want big sound, alpine delivers. [ paul  Dec 21, 2015 ]
To add extra amps,over amps produced by new head unit. Also because it's an Alpine,the plug n play to another Alpine head unit was flawless! [ Richard  Dec 17, 2015 ]
I wanted to add a little boost to my Infinity Reference speakers without spending too much. Just to give me an idea of the potential of my speakers, while i try to decide if I want to upgrade or not. It was at a reasonable price and I have a compatible Alpine head unit. Plus I was curious to see how it performed versus an average sized amp. [ Gilberto  Dec 16, 2015 ]
Great audio and easy install. [ Don  Dec 12, 2015 ]

32 questions already asked

Yes should work just fine [ kenneth  Aug 22, 2016 ]
Every car's dash space is different and I'm not familiar with the Fiero other than knowing that it's a midengine design. Does this mean that you have a trunk in the front and no firewall? Extend the wire harness if you need to and put the amp up there. I managed to sneak one of these amps behind the dash in my Miata. I had to use wire ties to secure it but it's in and doesn't rattle. The amp has generous wiring harness length and you should be able to find a place. The effort required to install it will be rewarded by the additional sounds you'll get from this amp. So, have you tried calling Crutchfield Support? [ Pat  Aug 01, 2016 ]
I put both of them, ( ya, I bought 2 for 2 different vehicles) under the dash. I used zip ties and little hope. I used it in my daughters 2000 VW bug and my 98 Chevy pickup. [ GENE  Aug 01, 2016 ]
I would not think so. With the plug and play, it is just that. It will amplify you door speakers. I would go the route of a bigger 4 channel amp if you feel the need of more power. I can tell you this little amp does a great job on my 4 door speakers. [ COREY  Apr 09, 2016 ]
You can't hook 2 of them together. [ terry  Apr 09, 2016 ]
I did a quick check in Crutchfield and it appears the 6 speaker system is (2 front door speakers + 2 tweaters) and two rear deck speakers. Typically, the tweaters are fed off of a filter from that is between the door speaker and the tweater. As such, you still have a four channel system which is what the Alpine Power Pack is designed for. So, I think the Alpine amp will work with your system. My application for this amp was in an old Jeep to power the dash speakers and overhead speakers. I used a separate amp to power subwoofers. I'll have to qualify my answer in two ways. One, simply speaking, this amp will work, is relatively easy to install and can drive your stock speakers better than the stock unit can. Two, while this amp worked ok, I don't think it has enough power to drive really deep sound at moderate to high volume levels. I would recommend deriving low level signal outputs, and put a high quality 5 channel amp and replace the speakers. If you want to take it in steps, you could install the Alpine power pact and then add a separate amp/subwoofer later. Hope this helps. [ Roger Daren  Mar 08, 2016 ]
If you are adding this to an existing sound system you might have problems. I installed this unit at the same time as a new Alpine radio. The wiring harness to the radio plugged right into the output of the amp, then the supplied cord plugged into the input end and into the radio. Unit was excellent, it was put into a Jeep Wrangler with the top off and had more than enough power to overcome road noise. You might have to do some creative wiring to a ford radio. [ JAMES  Mar 07, 2016 ]
First off, there is two versions of the power pack. One is the KTP-445A for use with compatible Alpine head units. The other is KTP-445U which is universal. In your case, you want to use the universal power pack. *Will it help? Well, it's an amplifier, so it's gonna boost the power going to you're upgraded speakers and improve your overall sound and volume. (if they're installed properly) *Do you need it? Yes, if you want to experience the actual benefits of an aftermarket speaker, but they'll still work without it. *Will it work with the factory radio? It will if you hook it up correctly. I should mention that some (if not all) factory radios have a pre-programmed EQ, so the factory speakers can sound their best. In other words, they give out a modified signal, unlike an aftermarket radio which gives out a pure, untouched signal. There's products to address that, like the JL Audio Clean Sweep for example. But you should still be able to connect an Alpine Power Pack directly to the factory radio without one. [ Gilberto  Mar 27, 2016 ]
It sure will.I was limited on space and this was a perfect fit and it powered up front and rear speakers which paired well with the 2 10 inch subs.The techs at Crutchfield are amazing.Enjoy the sound.--Marty [ MARTY R  Mar 04, 2016 ]
It's plug and play with the Alpine head unit I purchased. I do not know if it is compatible with your stock radio. The Polk speakers will add quality to your sound, it won't add power to your system. My guess is that the oem radio is sufficient to most needs. The alpine amp is just a booster, not a full blown unit. Most later model automobile sound systems already have an amp bigger than the Alpine unit. [ GARY  Mar 03, 2016 ]
This amp is specifically for Alpine receivers. It will not work with any other headunit. For a universal amp, try the KTP 445U amp. [ TYLER  Mar 03, 2016 ]
If you bought the universal version of this it will work with a stock radio. You will need to dplice into the factory wiring. You can tell a big difference with this littke amp [ COREY  Mar 03, 2016 ]
Yes it will work. It is worth the money big time! [ BRIAN  Mar 03, 2016 ]
My understanding is there are two versions of the power pack. I bought the version that mated with my alpine head unit. You want the general version. It added just enough to my setup to be a satisfying blend with my subwoofer. [ Ronnie  Feb 27, 2016 ]
No. First of all; the Alpine KTP-445A model is for use with compatible aftermarket car stereos only. Unless you have a compatible Alpine, you'll need to use the KTP-445U model instead: This power pack offers "Speaker Level Inputs" so an external Line Output Converter is not required to get the audio signal into the amp. If you decide to add a subwoofer and the amp you select does not offer the speaker level inputs, you can use the Audio Control LC2i converter to supply signal (RCA) and remote turn-on for the amp: I hope that helps! My Bio: [ Ryan  Feb 01, 2016 ]  Staff
I am not sure. i bought mine to power a new Alpine receiver because it was definitely plug n play. I would check and see if they have a pioneer to alpine harness converter. At at the same time, i put the Alpine power pack in with the receiver, Crutchfield sent me a factory to alpine harness converter that made the receiver plug n play. Best i can offer. [ VINCENT E  Jan 08, 2016 ]
I don't think so alpine does not have the same connector Enter an answer to this question. [ MARK  Jan 08, 2016 ]
No it's a plug and play for alpine [ DAVID  Jan 08, 2016 ]
Just plug in and play [ ALEX  Dec 26, 2015 ]
I would contact a Crutchfield advisor. While I think it is designed take take in a high-level input and should work with any speaker output on a radio, Alpine says it is designed to work with certain Alpine head units from 2005 and later. Honestly, I think you'd be better off with an Alpine 4-channel amp that you can install under the seat. Most of them can take a high-level input and will have better performance than the Power Pack. With either type of amp, you still need to run a power wire from the battery, so I don't think you're saving anything by choosing the Alpine Power Pack. [ RICHARD  Dec 19, 2015 ]
Yes. Your receiver has 6 sets of pre-amp outputs and will work great with this amp. [ Jeff  Dec 04, 2015 ]  Staff
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Oct 05, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Sep 22, 2015 ]  Staff
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget. [ Krissy  Sep 20, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Jul 12, 2015 ]  Staff
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: Or try our online support center: [ Krissy  Jul 10, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Jul 07, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Apr 05, 2015 ]  Staff
Amp does not get hot...and I have it stuffed in the dash of a jeep tj. Great product. Would recommend. As far as speakers, I always go with a company that only makes speakers. Such as Infiniti or Polk audio. That's my preference. [ LANCE E  Apr 07, 2015 ]
I installed mine in a 2008 F-150 and basically just laid it in the open space in the dash behind the CD receiver. I live in Florida and have experienced no issues with it in almost 2 years. Sorry, I can't speak about your impedance issue but it seems close enough to not matter. [ GLENN  Apr 02, 2015 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Mar 19, 2015 ]  Staff
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Feb 27, 2015 ]  Staff
I forwarded your question to an Advisor and they responded with the following: Yes, the KTP-445A amplifier is compatible with the Alpine ILX-007 head unit. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Dec 05, 2014 ]  Staff
I forwarded your question to an Advisor and they responded with the following: No, you will not be able to use that particular model. You will need the Alpine KTP-445U (500KTP445U) to use with your Kenwood receiver. If you would like to discuss further you can contact an Advisor directly by phone (1-800-324-9695) or online chat. [ Krissy  Nov 14, 2014 ]  Staff
I have been told it can be used with any unit but it requires knowledge of which wires go to which point. Alpine used to make a universal amp just like this one that had open wiring [ JOEY  Nov 12, 2014 ]
You can make it work by way of a universal adaptor that crutch field sells [ JOE  Nov 12, 2014 ]
You would need the wiring diagrams for both. But it should be possible, maybe with an adapter. The size of it makes it really convenient to hide. [ BENJAMIN  Nov 12, 2014 ]
When I boug mine there were two different power packs. One works only with alpine units, the other works with any unit. [ PHILIP M  Nov 12, 2014 ]
Since I installed this over a year ago, I can't be for sure but I do not recall any form of channel adjustment on my model. [ RANDY  Sep 21, 2014 ]
There aren't any gain settings on the unit itself Travis. It's just a straight 45 watts per channel to your speakers. The best sound will be if you have speakers that are matched to that. Or closely matched. I bought an entire package from crutchfield which included four infinity speakers that are around that wattage. I prefer to always buy speakers from a company that just manufactures speakers. Infinity, Polk audio, Altec Lansing, etc. Hope this message helped. Lance [ LANCE E  Sep 21, 2014 ]
There are no adjustments settings on this amp. I will say that the default settings on this would be equivalent to a "high" setting on an amp that is adjustable. On my INE-S920HD head unit, before turning the head unit's gain to the lowest setting, the volume would max out at volume level 10 (the volume goes to 40 or 50). With the gain all the way down it screams at level 20. I am running this amp with eight speakers. 2 5" polk audio db501's per channel (8 speakers total at 2ohms per channel). This little amp is bomb proof, rock solid, and sounds amazing. [ TONY M  Sep 21, 2014 ]
yes you do. the unit plugs into the alpine wire harness from the head unit. I would recommend buying a head unit wih this power pack it all works exellent together. No running power wires, speaker wires ect. if you purchase a traditional style amp. Hope this helps [ CHRIS T  Sep 15, 2014 ]
No you do not you can either hard wire it to your receiver or buy an adapter plug the amp comes with directions on the wiring process that is very easy to understand [ JOE  Sep 15, 2014 ]
No I run it off a JVC receiver. [ DUSTIN J  Sep 14, 2014 ]
Nope, it has RCA type inputs for the preouts of any receiver. connects just like any other amplifier... [ PAUL  Sep 14, 2014 ]
Yes u need an alpine receiver to use this [ DEREK  Sep 14, 2014 ]
It only works with alpine [ DAVID  Sep 14, 2014 ]
Good Morning, My installation did not require any seperate wire to the fuse panel or battery. I connected the amp to the factory wiring and the stereo (apline) to the amp. pretty simple install. [ ALEJANDRO  May 03, 2014 ]
No, just plug it in and your fine [ JASON  May 02, 2014 ]
No I did not run a separate wire, the radio power is fused. I have not had any issues. [ KEVIN  May 02, 2014 ]
I'm confused in which fuse does the product overview refer to? Is it the 20A on instrument panel? or 10A on the Head unit fuse holder? [ ferdinan  May 02, 2014 ]
For details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Apr 25, 2014 ]  Staff
You will have to bypass the factory amplifier to use this product. See the product research section on this product's page at Crutchfield's website. [ RICHARD  Dec 19, 2015 ]
I would imagine the techs at Crutchfield could answer this better than I, but I believe you cannot connect amplifiers in tandem without some seriously advanced circuitry. The Alpine power pack should take care of your needs anyways, so go ahead and disconnect your factory amp. [ BRAD W  Mar 03, 2014 ]
I baught one and i unplugged the wiring harness from the back of the stereo into the powerpack and then the powerpack to the stereo. It cannot be any easier. [ VICTOR  Feb 28, 2014 ]
Hi David, I did not get to use this product. I bought it with the guidance of Crutchfield tech support and I feel I did not get the correct advise. when I bought the unit I gave the make and model of my car with some other details. Since I had done all the rewiring for the Alpine head unit before I was told that I could just plug it in line with my set up. What they overlooked was that I already had a factory installed amp. When I installed the power pack it blew out a couple of circuit breakers because both amps were on line. I disconnected the power pack and returned it and continue to use the factory amp with the Alpine head unit and it works great. Sorry I could not be more help. [ FELIPE  Feb 28, 2014 ]
U cannot run a 2nd amp in your truck. ...short of some really fancy wiring that a electronics engineer would have to do some head scratch'n. My 99 dodge with the infinity system was a bleedn nightmare trying to hook it up. Finally, I pulled the amps(located on the speakers) replaced everything w after market wires, speakers, head unit, and amp. The good news is, you will absolutely love the sound. Best of all my trucks is the alpine amp setup. Good luck JJ [ JACK  Feb 28, 2014 ]
I have an 07 gmc sierra classic. I'm going to purchase an alpine head unit to replace the factory radio. Will this power pack be compatible with my truck? [ robby  Apr 20, 2014 ]
For details on compatibility or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle. [ Krissy  Jan 31, 2014 ]  Staff

Searches related to the Alpine KTP-445A Power Pack Compact upgrade amplifier for your Alpine receiver — 45 watts RMS x 4