Alpine KTP-445A Power Pack

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

Item #: 500KTP445A

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125 Reviews

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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.

Product Highlights:

My system has plenty of power. Who needs an amp?

You might think you don't need an amp because you have a 400-watt system in your car, or because your new stereo puts out 50 watts a channel. But those are peak wattage ratings, which may boil down to 15 or 20 watts per channel, using the more realistic RMS rating. An amp sends your speakers the power they need to deliver your music with clarity and impact, whether you're using factory speakers or high-performance components. And low-frequency reproduction requires lots of power, so an amp is an absolute must if you're adding a sub to your system.

Alpine KTP-445A Power Pack Reviews

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Best Decision ever

Written By sarge, Washington on Wednesday, November 11, 2015

Crutchfield Customer Review (What's this?)

Quite possibly the best decision i have ever made in car stereo installation is to get one of these power packs installed with an Alpine head unit!! My Infinity Speakers are rocking off the charts, the RMS wattage per channel definitely helps to offset the giant bass I am producing with my amp and sub, no matter how loud I turn the Sub up I can still hear the crystal clear Highs and Mids produced by my speakers. Don't get me wrong, you do not need this if you do not update your stock speakers in your car, but if you do, you definitely need this product to meet their full potential.

Pros: Amazingly easy to install, easy to hide, fits perfectly behind dash

Cons: None... Even converting my standard fuse from 10amp to 15amp was extremely easy, these should be a bundle option with every alpine stereo sold!!


Written By Anonymous, Indiana on Wednesday, October 21, 2015

Crutchfield Customer Review (What's this?)

Good product.Nice easy install,plug n play no need for running miles of wiring.Not looking for a competition block shaking system so this is a nice addition.Cleans up and improves already good sound from Alpine HU.Driving 6x9s and 6.5s nothing monstrous,sounds good!

Pros: Everything

Cons: Nothing unless you are lookinf to build a system with monster subs.Good enough for normal coaxes.

Sounds great

Written By wkc, North Carolina on Wednesday, October 14, 2015

Crutchfield Customer Review (What's this?)

I put this in my 2004 Jeep Wrangler along with an Alpine Head unit (Alpine CDE-HD149BT CD Receiver) and I made the unit sound great. It is not going to "thump" the neighbor's house but it will help you hear the radio when the top is off the jeep. Easy to install, hard to find a place to hide in a wrangler. As of right now it lives in the glove box. I am looking for any ideas on where to mount it, and how, on this year jeep.

Pros: Easy install, sounds great.

Cons: None so far

Must have for the money

Written By Brad, Illinois on Monday, September 28, 2015

Crutchfield Customer Review (What's this?)

Great idea Alpine!

Pros: Easy installation, plenty long wire leads for remote location, small and powerful

Cons: none

Great buy!

Written By PMartin, Clayton, North Carolina on Tuesday, September 15, 2015

Crutchfield Customer Review (What's this?)

A Great addition to my alpine ilx-007 unit. Powerful with clear sound.

Pros: Very easy and quick installation. small enough to fit behind the head unit.

Cons: None, very happy with this power pack unit.

Yes - Love it!

Written By Matt L., Pennsylvania on Friday, September 04, 2015

Crutchfield Customer Review (What's this?)

Alpine - I love this! No more power wires to the battery to amp your internals. I Really didn't think this little power pack would live up to its ratings. I had a 4 channel Memphis amp 50 x 4, and I feel I get better sound quality (New Alpine deck probably helps as well) out of this little dash mounted 45 x 4 power pack. I will never run a full 4 channel amp again!!

Pros: Easy to wire, hides in the dash, no wire to the battery needed. Worth every penny

Cons: Haven't found one

Love it !

Written By Jwalenta, Michigan on Sunday, August 30, 2015

Crutchfield Customer Review (What's this?)

Made a huge improvement on the boat. 5 minute install. I'm surprised how much cleaner the sound is at moderate volume, which is our typical level. Worth twice the price.

Pros: Super simple install Much improved sound Takes up very little space

Cons: None so far

Nice compact amp

Written By Scott, Pennsylvania on Wednesday, August 19, 2015

Crutchfield Customer Review (What's this?)

Clean sound, easy install.

Pros: compact size, plug and play

Perfect fit

Written By RollN1, Boulder, CO on Monday, August 17, 2015

Crutchfield Customer Review (What's this?)

When I first got the amp I honestly was surprised how small it was. It's so small that the bundle of wires that comes with it are actually bigger than the amp itself haha. I installed it into my 85 4Runner tucked under the head unit. Once you tuck in the wires it can literally fit almost anywhere you could imagine. Currently I have it pushing a pair of Kicker 4" in the front and kicker 5 1/4 in the rear. Without the compact sub reggae, rock and classical sound amazing though rap and other genres that have a lot of bass need the additional sub to really enjoy the beat. I installed a Kenwood ksc-sw11 under the front passenger seat and the system sounds amazing, exactly what I wanted thanks to Crutchfield!

Pros: Super small and powerful and its easy to mount/hide.

Cons: Hiding the wires was the only problem I ran into other than that the product is solid.

Alpine KTP-445A Power Pack

Written By Charles, Kentucky on Tuesday, July 28, 2015

Crutchfield Customer Review (What's this?)

Easy to hook it up plug and play. I would buy this again with my Alpine deck.

Pros: Make my JL speakers sound great in my Ford F250 2005 Crew Cab

Cons: None

alpine ktp-445a

Written By Mike, roseville, MI on Saturday, June 20, 2015

This amplifier is amazing. The sound quality with the cde-164bt, type r car speakers front spr -6.34 and spr -68 in the back. Would never expect anything less from alpine.

Pros: Brings out the full quality sound from the cde-164bt and the speakers sound nothing short than awesome.

Cons: Not a one

Big difference in small package

Written By RayMan, Oregon on Sunday, June 14, 2015

Crutchfield Customer Review (What's this?)

So, amping up is the way to go with any deck installation. Remember to look at the RMS on the head unit and not the peak watts. I paired this with an Alpine HU with 18 W RMS and it's a pair of Kicker 6 3/4 2 way speakers and what a big difference to the sound. You can't install nice speakers and expect the HU to power it. Amp up and this amp is super easy to install and it is hidden behind my HU out of view.

Pros: Portable. Easy install. Good length of wiring to stash the unit somewhere behind your dash.

Cons: None.

Super easy install

Written By BenW, California on Sunday, May 31, 2015

Crutchfield Customer Review (What's this?)

This is probably one of the easiest car audio installs I have ever done. It took me way more time to find the space to put the amp in the dash of my MINI Cooper. It is literally plug and play. Nice improvement in sound quality at all volumes.

I've had my Alpine head unit for a while, which I love for the iPod integration; I'm able to have a huge part of my music library right in my car. I have upgraded the speakers in my MINI and added a Bazooka subwoofer, but have been reluctant to add an amp due to the limited space and lack of willingness to tear apart my interior to install under the seats. Then I read about this amp and all the great reviews and knew I had to give it a try. With the limited space of a MINI I knew it would be a challenge to find someplace in the dash but it fit behind and above the head unit just fine with a little manipulation. I just used some zip ties for the amp and the extra wire and it is in there pretty securely.

Anyone who has an Alpine head unit or contemplating upgrading to one should just get one.

Pros: Easy install, nice sound improvement for an Alpine head unit

Cons: None

worth every penny

Written By TaosFly, Napa CA on Sunday, May 24, 2015

Crutchfield Customer Review (What's this?)

Installed it yesterday. It is very easy to do. Have a 98 4runner with stock speakers. I couldn't beleive the difference it made in sound quality. It is worth every penny.

Pros: Easy install. Takes about 15 minutes. Don't need a bulky amp in your trunk. Sounds great.

Cons: Can't control the gains. So you can't tinker with it.

Alpine KTP-445A Power Pack

Written By Anonymous, Auburn, IN on Monday, May 11, 2015

Crutchfield Customer Review (What's this?)

Just what I needed! Perfect plug-n-play with the Alpine head I already installed on my harley last year. Fits right on top inside the fairing and really made a difference. Just enough power to hear the music clearly over my obnoxious pipes.

A nice unit

Written By Alex, Maine on Saturday, April 11, 2015

Crutchfield Customer Review (What's this?)

A great way to increase power, quickly and easily. This is a great idea from alpine a tiny plug in amp for their headunits to boost power. The amp definitely boosts power and is very clean sound. The only bad thing is that your alpine headunit has no clue that it is connected to this, which makes it so that any level is louder and unfortunately you have no way to adjust parameters like you would in a true 4 channel amp. I love to setup my amps so that at max volume on the headunit there is no distortion from the amps. Giving me the entire volume range.

Pros: Superfast installation, decent power with much better overhead than factory unit.

Cons: No adjustments.

Alpine KTP-445A

Written By Anonymous, Elmwood Park, NJ on Monday, March 30, 2015

Crutchfield Customer Review (What's this?)

Great amp. Plug in and play. Makes my stereo and speakers sound great in my 2010 Jeep Wrangler JK.

Pros: Simple to use and install .

Cons: None

Good sound

Written By 99 max, Shannon, AL on Sunday, March 22, 2015

Crutchfield Customer Review (What's this?)

Sounds very good for such a small package

Pros: Fits anywhere

Cons: None

Make Mine ALPINE

Written By Mark, Texas on Sunday, March 08, 2015

Crutchfield Customer Review (What's this?)

With the Alpine head unit, Alpine R series speakers, This amp is just what is needed to make the sound come together, Keep in mind the system is in a Kenworth W900l And sounds great, Thank you Crutchfield

Pros: Plug and Play

Cons: none

added power to my 52BT

Written By KJ, Nc on Saturday, March 07, 2015

Crutchfield Customer Review (What's this?)

Great add on power. Really makes the sps-517 in the doors jump.

Pros: Easy to add

Cons: Zip

So easy!

Written By Reuben, Boston, MA on Monday, February 16, 2015

Crutchfield Customer Review (What's this?)

This thing is such an easy addition to improve your car audio. I've installed several larger amp set ups of varying complexity in mine and my friends cars over the years but I gotta say, I don't think I'll be doing it again anytime soon. This class D amp does a great job for its size and its ease of installation. Literally, all I had to do was splice an Alpine wire harness to the car head unit harness, find a clever place for it and the job was done. So easy and I'm honestly amazed at how much power is produced, I don't even run this thing close to full volume and it bumps the car.

Pros: Easy Sufficient power

Cons: Would be difficult to add a sub

Super simple

Written By Ken K, New Mexico on Monday, February 09, 2015

Crutchfield Customer Review (What's this?)

This amp is a great addition for those of us that have small cars and who may not want to run additional wires. This really boosted the sound quality of my Alpine head unit. The sound isn't super crisp on the highs but it is warm overall. I think that you sacrifice some quality for the easy installation and use.

Pros: easy to install, small form factor

Cons: Not super crisp highs but its good for what it is.

Alpine KTP-445A

Written By maui808, Kaneohe, HI on Monday, January 26, 2015

Crutchfield Customer Review (What's this?)

Bought this along with the Alpine CDE-154BT. They work great together and makes my 6x8's come to life.

Pros: Plug and play. No more RCA's, power or ground to run. Super compact and everything fit behind my head unit in my 2001 Tacoma.

Cons: Extra long wire harness. But I just stuffed it all behind my HU.

Alpine KTP-445A

Written By M Byrd, Anchorage, AK on Saturday, January 24, 2015

Crutchfield Customer Review (What's this?)

Installed this power pack with my Alpine digital head unit and Alpine SPR-68 and it all sounds perfect.

Pros: Very easy installation and fits nicely in my dash behind the head unit.

Cons: No cons. Absolutely love it.

Alpine KTP-445A Power Pack

Written By EN, CA on Tuesday, January 20, 2015

Crutchfield Customer Review (What's this?)

Just installed new speakers before adding this amp. The sound before adding the amp was good, but when I plugged in this amp the sound was great. And when I say plugged in it was just that easy to hook up, I spent a total of about 20 minutes and most of it was to find a location for the amp.

Pros: super simple install, Great little amp adds some needed punch

Cons: none

Great addition to your Alpine HU order

Written By Chumly, San Diego on Saturday, January 03, 2015

I ordered this w/ the 154BT HU & 6.5" S-model components for a '95 Miata. I test ran just the HU and speakers then put the top down and went for a spirited drive. Muttered, "decent", then went back for the amp install. Amazing and instant improvement!

My install wasn't plug-n-play as it should be; I'm complicated. The Miata doesn't give you much space and the wires are quiet long. I cut the harnesses down and soldered and heatshrinked so it wasn't so cluttered and stuffed. I'm sure it'll get warm. I also put the OEM adapter on this amp instead of the HU, again less clutter.

I ran a fused 14G wire from the yellow to the battery in the trunk. It takes 10min and easier than getting to my fuse block just to see if it's 15A or not. There is a 15A fuse on the amp, a 10A on the HU, & I used a 20A on the bat run so they are individually protected.

NA Miata owners, this fits nicely behind the metal bracket behind the HU, like it was meant to be there.

Pros: -Must have with any Alpine HU install w/ aftermarket speakers. Install "can" take 30 minutes max and really is plug-n-jam. -Priced very fairly given other options can easily double the cost once installed and done.

Cons: -Don't know what the 2 hold-down brackets are for. No hardware for them and instructions just show how to plug it in. -Connectors are TIGHT. They do secure nicely but takes a lot of effort. Do this part before working in tight spaces.

Alpine KTP-445A Power Pack Reviews

Written By james, New Jersey on Wednesday, December 31, 2014

Crutchfield Customer Review (What's this?)

works great easy to install

Pros: easy to install

Cons: none

Clean sound in a small packae

Written By JH3, New York on Monday, December 29, 2014

Crutchfield Customer Review (What's this?)

Very easy to install in with a new alpine ine-w940, just plug and play. Greatly improved the sound in a complete car stereo upgrade. Installed in 4th gen 4runner in the small compartment inside the glovebox.

Pros: easy to install, sounds great.

Alpine KTP-445A Power Pack

Written By Anonymous, jonesboro on Wednesday, December 24, 2014

Crutchfield Customer Review (What's this?)

Plug n play...more than enough power for my little system


Written By RichOne, Louisville,Kentucky on Monday, December 15, 2014

Crutchfield Customer Review (What's this?)

Added a little more depth and clarity to the sound.

Pros: Easy to hook up

Cons: About 30 dollars less on two other sites

Alpine KTP-445A Power Pack

Written By greg, charlotte nc on Sunday, December 07, 2014

Crutchfield Customer Review (What's this?)

The Alpine KTP-445A Power Pack was .

Pros: Worth every penny and was super easy to install.

Cons: None

Alpine KTP-445A

Written By Larry, Kauai Hawaii on Saturday, November 15, 2014

Crutchfield Customer Review (What's this?)

very easy to mount and simple connect to the Alpine 149BT receiver..Boosts as it's advertized..When I got the 149BT Radio/CD player I was dissapointed at the low barely tickled the JBLs in my truck. this unit should have been built into the alpine receiver for the cost of it.

Pros: Nice unit

Definitely the "secret sauce" in my vehicles

Written By doa70, NJ on Thursday, October 16, 2014

This has just enough punch to take your base head unit that does less than 20w RMS and adequately feed speakers capable of handling over 80w RMS. Sound quality is excellent, it's not loud, just a great, full sound. I've added this to two all Alpine systems now and it is definitely the key piece of gear that brings it all together.

Pros: Size, good heat dissipation, not over powering, price

Cons: None yet!

Nice punch for the price

Written By Aaron, Albany, NY on Wednesday, October 08, 2014

Crutchfield Customer Review (What's this?)

Added a good deal of punch and volume to my system. A good complement to my Alpine deck, and well worth the price. Installation was easy and straightforward. I was even able to mount it in the dash behind the stereo, though it was fairly tight.

Pros: Good value. Easy install.

Cons: None

Alpine KTP-445A Power Pack Review

Written By Ben, Manchester, CT on Monday, October 06, 2014

Crutchfield Customer Review (What's this?)

It sounds great. Its small and will fit in a lot of places. I dont have a lot of room in my truck so this fits well. As a kid I always wanted some alpine gear, now I have some, now I am happy. I have it paired with alpine 6.75s and alpine 5.25s.

Pros: Fits behind my head unit in the dash of my 02 dodge dakota. Its small, stays cool, it doesnt overheat and shut off due to being inside my dash. You could mount this easily in a glove box or small console.

Cons: None really. Check your system, it required a larger power source then the 10a power source dodge provided. My alpine head unit and this require at least a 25a fuse.

Couldn't Be Any Easier

Written By Lee, Bonners Ferry, ID on Wednesday, September 17, 2014

Crutchfield Customer Review (What's this?)

I purchased this amp to compliment the Alpine CDE-143BT I purchased to replace a older Alpine head unit. Installation could not have been any easier. The wiring harness only connects one way, so mixing up the wiring is not a concern. Alpine supplies more than enough wiring to place this nearly anywhere in your dash and its compact size is perfect.

I did however, go back and forth between having the speakers driven by this amp and just the head unit and did not noticed a huge difference. That may be due to the speakers (4 Pioneer TS-G1644R 6.5"'s), although they are rated at 40 watts RMS and this amp is rated at 45 watts RMS, which should be pushing them quite well. just wish I knew how to test the actual wattage at my speaker connections to ensure the amp is working correctly.

Pros: Easy to install, no need for extra wiring as with other amps. Compact size easily fits inside of my dashboard. Lots of length to the wires for ease of placement. Ample power to push most entry level speakers.

Cons: Cannot tell if amp is on or not as there is no indicator light. I guess that is because it's intended to be installed out of sight in your dash.

Decent and seamless with alpine HU

Written By bkelly, ATL on Monday, September 15, 2014

Crutchfield Customer Review (What's this?)

I bought this to add a bit of oomph to the Alpine CDE147BT HU I bought last year (this model is discontinued). I like that it's compact and has seamless connectivity to my HU. I was able to easily place it behind the temp control panel in my 4Runner-- it has little heat generation so you can stuff it pretty much anywhere. The power it adds is not substantial-- ~4db overall-- but i didn't want it to blast music, I just wanted to have my factory speakers push it out in all ranges a bit more at lower volumes. This amp it does. I'm happy with the sound-- if I wanted improvement I'd have to replace the factory speakers, which I'm unlikely to do with this vehicle. In general it has added depth and clarity to what is already a great sound from this head unit. I can't vouch for its overall power for those looking to blast the neighborhood from their car-- if I tried that I'd likely blow my factory speakers. But if that's what you're looking for, I'd start shopping for hearing aids since you're gonna need them, boyo. Installation was a breeze-- it's completely plug and play with alpine head units.

Pros: Easy to install Price Very small footprint Decent power boost for existing HU

Cons: None experienced at this point (1-2 months in)

Easy Upgrade

Written By momule, Rural Eastern Missouri on Thursday, August 28, 2014

Crutchfield Customer Review (What's this?)

Installation was as simple as plugging the amp in. The results far outweigh the cost and make my 4 Polk 6X9 speakers shine. The length of the provided wiring made it possible for me to place the amp in the glovebox which was not ideal but space behind the dash on my 02 Ranger is very limited. The improvement in sound is enough to make me hesitate to spring for a subwoofer.

Pros: Too easy to install - plug and play and forget This one is matched to many Alpine head units - do your homework Best for those who want better sounds in the car...maybe not for those who need to rattle rivets and spot welds loose.

Cons: zero cons...this is just a good deal

Alpine KTP-445A Power Pack

Written By kevin m, oakdale, ca on Tuesday, August 19, 2014

Crutchfield Customer Review (What's this?)

excellent amp, plug and play for alpine head units

Pros: good clean sound. doesn't get hot

Cons: none

Great compact Amp

Written By Kevin, South Carolina on Tuesday, August 19, 2014

Crutchfield Customer Review (What's this?)

Really makes my Polks sing out loud in my jeep.

Pros: Easy to install, just plug and play, its that easy.

Cons: none

Sounds great

Written By CaptainWinter, Seattle, Wa on Friday, August 15, 2014

Crutchfield Customer Review (What's this?)

Sounds Good, it really does. My car is a Honda Civic Si (2005) with an Alpine Stereo, and factory-installed speakers. My friend has since warned me that the new Power-Pack thing might damage my speakers down the line, something to do with the speakers receiving more power than they are designed for, even if I don't blast the volume. I've had the system in my car a few days now now and it sounds really good. If you don't think about it, or you're concentrating on stirring conversation with whoever else is in your car, you might not notice at first, but when you put on music that was recorded with quality, it sounds great. I should note that I'm listening to music through my ipod, which is connected to the Alpine stereo's USB jack.

Pros: Not expensive for audio equipt Sounds good.

Cons: If your car stereo gets stolen, it's an extra bummer. Not a night-and-day contrast to the factory install.

Great upgrade for 2004 Miata

Written By Eric, Fresno, CA on Friday, August 08, 2014

Crutchfield Customer Review (What's this?)

This is a beefy little mighty-mite. I shortened the wiring harnesses (using solder and heat-shrink tubing) and padded and mounted the unit to some of the dashboard framing to the left of the glovebox in my 2004 (non-Bose) Miata.

I connected the unit to an Alpine UTE-52BT head unit and ran the yellow battery lead over to a vacant 20-amp "audio amp" fuse socket in the under-dash fuse panel using an Add-a-Circuit adapter from Pep Boys, for power.

This thing really woke the stock speakers up; they play loudly and with excellent bass. Absolutely no complaints at all.

Pros: Compact and powerful. Easy to connect.

Cons: Not required, but to save space and lower impedances I chose to shorten the wiring harnesses to make it fit better, but that was no big deal.

Great when paired with X008U Headunit!

Written By kelbyv, Lubbock, TX on Thursday, August 07, 2014

Crutchfield Customer Review (What's this?)

Adds great sound quality to any Alpine headunit. Easy to install! Makes the radio sound that much better! Who doesn't like louder, better quality sound?

Pros: Easy install. Inexpensive compared with other 4-channel amps.

Cons: None!

Alpine KTP-445A Power Pack

Written By Kevin, Fort lauderdale, Florida on Monday, August 04, 2014

Crutchfield Customer Review (What's this?)

This is the perfect amp to seriously upgrade your system. It was simply plug and play with my alpine head unit. Up and running in under 10 minutes. This is not for thumping the trunk but for serious and very clean can only hear the music sound!

Pros: everything....its just right!

Cons: None, its just amazing.

Alpine KTP-445A Power Pack

Written By mtrops, Wrightwood, CA on Monday, July 28, 2014

Crutchfield Customer Review (What's this?)

Perfect for my truck, gives my new Alpine stereo just the right amount of punch and makes the music much more dynamic. Reasonable price

Pros: Ease of installation and being able to hide it behind the dash

Very easy to install. reasonable price for the output.

Written By Anonymous, Oklahoma City, OK on Saturday, July 26, 2014

Crutchfield Customer Review (What's this?)

Very user friendly and helpful instructions. Makes install a Breeze.

Pros: Good price. Great product.

Cons: No Cons

So easy it scared me..

Written By DJ Puppy, Kalamazoo Mi on Friday, July 25, 2014

Crutchfield Customer Review (What's this?)

Way to easy to get the additional sound out of my Alpine CDE W235BT unit. I have a very basic install with 4 Alpine speakers so I was not sure the Amp would make a big difference. Wow it really does. I need to turn it up a tad to get full effect but not a problem. The first one I got with the head and speakers had issues. One phone call, 3 minutes on the phone and a new was delivered a day and a half later with return shipping stuff. Then came the reinstall....5 minutes back in business.

Pros: Easy to plug into Alpine Head. Great clean sound. Small with long wires for each side; easy to bundle or leave long for remote install. Oh and the great Crutchfield service and support. Basic simple instructions.

Cons: none....

awesome system option

Written By Michael, Harrisonburg, VA on Tuesday, July 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!

Written By Paul V, Sierra Vista,AZ on Saturday, July 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

Written By Seth, Richmond, VA on Wednesday, July 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

Written By jack, trevose,pa on Monday, June 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

Written By Clark, Searcy, AR on Sunday, June 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

Written By Gutierrez, Longview, Texas on Sunday, June 08, 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

Written By WWB III, 70774 on Thursday, June 05, 2014

Crutchfield Customer Review (What's this?)

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

Alpine Ktp-445A

Written By Michael, Hartford City, IN on Wednesday, May 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

Written By Wildcat1, Paducah, KY on Saturday, May 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!

Written By Mike S., Fayetteville, NC on Friday, May 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 !

Written By Brian H, Bluffton SC on Thursday, May 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

Written By Greg, Charlotte, NC on Tuesday, May 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

Written By Gil928, Kemah, TX on Tuesday, May 06, 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!

Written By g_boy91, Brownsville, TX on Monday, May 05, 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?

Written By EMTJJP, Dalton, MA on Monday, April 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

Written By Blaze, Morgantown, PA on Tuesday, April 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

Written By lcseds, Durham, NC on Friday, April 04, 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

Written By Anonymous, United States on Friday, April 04, 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

Written By David G, Odebolt IA on Monday, March 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.


Written By WarrenW, New Jersey on Friday, March 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

Written By Falcon3, Atwater, CA on Wednesday, March 19, 2014

Crutchfield Customer Review (What's this?)