Alpine KTP-445 Power Pack Upgrade your Alpine receiver to 45 watts RMS x 4 Zoom Front Photos Videos My vehicle's homepage We don't check this item for fit or compatibility. Item# 500KTP445 offer details Item# 500KTP445 Review Summary 98 people say DISCONTINUED This item is no longer available to purchase. Contact us for other options Call Email Original price $129.99 Shop all All Car Amplifiers Shop all All Car Amplifiers We recommend this similar item, or shop all All Car Amplifiers Alpine KTP-445A Power Pack Head Unit Power Pack 45W x 4 Car Amp compact plug-and-play amplifier for Alpine in-dash receivers45 watts RMS x 4 at 4 ohms $129.99 Compare discontinued and similar item By buying this product you'll earn up to 130 Rewards points. When you sign up for a Crutchfield account, you’ll be enrolled in Crutchfield Rewards. You’ll earn one point for every dollar you spend on gear from us. You can turn your points into Rewards Cards that you can use toward future purchases. You can sign up for an account now, or after you complete your purchase (you’ll get credit for the points either way). Sign up for a Crutchfield account Share this product: Overview Details Staff Reviews Customer Reviews Category Info 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. Our take on the Alpine KTP-445 Power Pack by Zak Billmeier The KTP-445 connects to any 2005 and newer Alpine headunit that uses a black power harness. It will not work with the CDE-100 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. Best of all, you install the compact Power Pack by plugging it directly into your Alpine receiver's wire harness — no extra wires to run, and no other connections needed. Note: The KTP-445 Power Pack won't work in systems where an outboard factory amplifier is still active. You'll have to bypass the factory amp if you want to upgrade your power with the KTP-445. Please contact an Advisor at 1-888-955-6000 to check compatibility if you have any questions. See more info on this item Highlights:plug-and-play compact Class D amplifier for Alpine in-dash receivers4-channel amplifier45 watts RMS x 4 at 4 ohms (CEA-2006 compliant) selectable gain switch (high/low)fuse: 15A2-9/16"W x 1-1/2"H x 7-13/16"Dwarranty: 1 yearOur 60-day money-back guaranteeShop all Alpine Car Amplifiers Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico. Hands-on research from the Crutchfield Labs (what are the Labs?) Features and specs chart | What’s in the box? | In-depth notes Features and Specs Features and Specs Performance RMS Power Output (Watts x Channels) Loading... 45 x 4 Peak Power Output (Watts x Channels) Loading... --- Power at 2 Ohms (Watts x Channels) Loading... N/A Bridged Power (Watts x Channels) Loading... N/A Minimum Impedance Bridged Loading... N/A Minimum Impedance Unbridged Loading... 4 Best Frequency Response Loading... 20-20k Hz THD at Rated RMS Power Loading... 1% Signal to Noise Ratio Loading... N/A Input Voltage Loading... 14.4v Features Amplifier Class Loading... D Low-Pass Crossover Frequency Loading... N/A Low-Pass Slope (dB/octave) Loading... N/A High-Pass Crossover Frequency Loading... N/A High-Pass Slope (dB/octave) Loading... N/A Bass Boost Loading... No Bass Boost Frequency Loading... N/A Fan Cooled Loading... No Fuse Rating Loading... 15 Speaker Level Inputs Loading... Harness Preamp Outputs Loading... No Width (inches) Loading... 2-5/8 Height (inches) Loading... 1-1/2 Depth (inches) Loading... 7-13/16 Parts Warranty Loading... 1 Year Labor Warranty Loading... 1 Year Product Research Product Research What's in the box? Download owner's manual Head Unit Power Pack (45W x 4 RMS) with attached 38" harness terminated by a male Alpine connector on one end and an attached 29" harness terminated by a female Alpine connector on other end Instructions 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 open the box, verify contents, 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. Features Overview: The Alpine KTP-445 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 headunit. The KTP-445 amplifies your Alpine headunit's power output, resulting in a 150 percent power increase over the original power from the headunit's built-in amplifier. Compatibility: The KTP-445 connects to any 2005 and newer Alpine headunit that has a black power harness. Please check with your Crutchfield Product Advisor to confirm compatibility. Installation: Since the KTP-445 is small and compact, it installs behind your Alpine headunit in the dash of most vehicles. Its plug-and-play connections keep it simple, without requiring additional wiring or special tuning. The male harness connects to the rear plug on your Alpine headunit while the female harness plugs into your Alpine headunit's harness (included with your Alpine headunit). Then connect the wires from the Alpine headunit's harness to your factory 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-445. Controls: A high/low gain switch on the bottom of the amplifier allows for proper gain settings, whether or not a subwoofer is part of the system. Product reviews from the Crutchfield Labs Product reviews from the Crutchfield Labs (what are the Labs?) Video: Installing the Alpine KTP-445 Power Pack Video: Installing the Alpine KTP-445 Power Pack Robert Ferency-Viars 8/24/2009 This video demonstrates how easy it is to install the Alpine KTP-445 Power Pack amplifier module. The Power Pack gives you the power and improved sound of an external amplifier at a fraction of the... Product Reviews Review this product Submit a review and you will be entered to win a $150 gift card Crutchfield Great Gear Giveaway Official Sweepstakes Rules Reviews for the Alpine KTP-445 Power Pack Average Customer Review: 98 people say: Review this product: Thanks for taking the time to share your experiences about this product. Please be sure to focus your comments on the product itself. Read our Review Guidelines for more information. Review title * Email Your email won't be visible. Please use the email address that is associated with your order. Display name (e.g., JohnD) Your review will be signed using the display name and location * Your location (e.g., Charlottesville, VA) * Your rating Click on a star to rate the overall product on a scale of 1-5 1500 characters left * Your review Attach a YouTube Review Crutchfield Video Review Guidelines Only submit videos that you made or are authorized to use. Do not submit videos that contain music, video or visuals that are copyrighted and belong to someone else. Please see our Review Guidelines for more information. Submit the URL of your YouTube™ video review or product demonstration. e.g., "http://www.youtube.com/v/o79TWHh598U" 500 characters left Pros 500 characters left Cons * Agree to Terms By checking this box you agree your review becomes the property of Crutchfield, that you are over 18 years of age, that you own or have owned this product, and that you are located within the United States or its territories. Please see our Review Guidelines for more information. We reserve the right (but are not obligated to) review all submissions and edit or remove any review in any manner which we deem necessary. Your review should be posted within seven days. Filter by rating: 5 Star: (67) 4 Star: (24) 3 Star: (5) 2 Star: (1) 1 Star: (1) Sort by: Date Reviewed Rating Helpfulness Showing: 1-20 of 98 View page: 12345 » Items per page: 10 20 50 5 out of 5 Packs Some Punch !!!!! Written By paryted, Lanoka Harbor on Tuesday, April 30, 2013 Crutchfield Customer Review (What's this?) This amplifier was installed in my 2005 Wrangler to make it possible to hear my stereo in the summer when the top will come off. I bought this amp because of the alpine head unit I purchased and the stated plug n play installation. It went even smoother than stated. The 4 channels at 45 watts are more than sufficient to power the set of infinity speakers in my jeep. The sound is crystal clear. The small size made it possible to install this amp behind my dash where it is totally out of sight because if you have a jeep you know that space is extremely scarce especially as the size of the system itself grows and we all know about that !!! Pros: Ease of install. Small size. Pre wired. Cons: Only works with alpine head units Was this review helpful? Yes | No 4 out of 5 Pretty Good. Written By Nick D, Riverside, PA on Monday, March 18, 2013 Crutchfield Customer Review (What's this?) Did not provide a substantial boost in volume, but it did clean up the sound and improve clarity at higher levels. Plug and play with the Alpine CDE-133BT. For the ease of installation and the size you can't really go wrong. Crutchfield is great as usual. shipped quick and works fine even though i got an open-box deal. Was this review helpful? Yes | No 4 out of 5 Alpine KTP-445 Power Pack Written By Jeff A, MA on Sunday, March 10, 2013 not plug and play compatible with Alpine CDE-110 (gray connector). you can cut off the connectors on either end of the amplifier and splice in though. hook the blue/white wire to switched 12V/ignition. If you only hook up the red wire to ignition the amplifier won't power on. 1 out of 1 people found this helpful Was this review helpful? Yes | No 3 out of 5 Make sure this is the one you need Written By Preston, Palm Bay, Fl on Wednesday, February 27, 2013 Crutchfield Customer Review (What's this?) As the title says, make sure this is the amp you need. The connector on this unit only fits alpine units with the black connector, and not the gray. I thought since my receiver was new enough that it would fit. Wrong ! you will end up having to wire it manually just like you would the 445U. Also this unit has less advanced controls then the the 445U Personally i dont see why any one would get this unit any more, especially if they have the gray harness connectors. Pros: Same wattage as 445U, Quick Connect if you have black connectors. Cons: Less audio controls, more wire splicing if your using gray connectors or non-alpine deck. Was this review helpful? Yes | No 5 out of 5 Great Amp Written By Billy, Massapequa Park, NY on Friday, February 15, 2013 Crutchfield Customer Review (What's this?) This is a great amp. Extremely easy to install. Cables are nice and long so i mounted mine in my glove box. I have a 6 speaker system so i was skeptical but this amp does a very nice job, not as good as I'm sure an independent amp would do on the 4 speakers then another for the two, but all in all i'm very happy. Pros: Compact size. Cable length Cons: None so far Was this review helpful? Yes | No 4 out of 5 NICE UPGRADE! Written By PAT, TEXAS on Wednesday, February 13, 2013 Crutchfield Customer Review (What's this?) IT DOES EVERY THING IT SHOULD . IT WONT ROCK THE HOUSE DOWN, BUT ITS DEFINITELY A BIG IMPROVEMENT OVER STOCK. I THINK ALL AMPS NEED TO BE AS EASY TO PLUG IN AND USE . Was this review helpful? Yes | No 5 out of 5 Works Great Written By Rockin Ranger, Magnolia De on Friday, February 01, 2013 Crutchfield Customer Review (What's this?) Works Great plug and play puts a little more bump to the 4 Kicker 2way components pulled the sat-rec behind the glove box in my Ranger it fit real nice plugged it in to the hd137bt and boom EASY Pros: amps 4 dummies lol Cons: none Was this review helpful? Yes | No 5 out of 5 Alpine KTP-445 Power Pack Written By Anonymous, Kyle, TX on Monday, January 21, 2013 Crutchfield Customer Review (What's this?) Makes a big difference in the sound. Paired it up with my alpine 121 I had put in last year. Now the system is louder, is able to keep up with the sub I have on a 500w amp, and is able to drown out the jake brake. The old factory system was drowned out by the engine alone with the windows down. (no, I did not take out the muffler or anything like that). The power back should be bought togather with the alpine head. Pros: Very easy to install, no wires to run, and it fits right behind the dash. Cons: No crossover controls, too bad it can't be hooked up to an EQ like traditional amps. Was this review helpful? Yes | No 5 out of 5 Way Easier than installing an amp! Written By Anonymous, Green Bay, WI on Friday, January 18, 2013 Plugged into Alpine HD137BT and sound was way better than factory system...put in aftermarket speakers and the sound really shines! Pros: Super easy install and nice power bump up Was this review helpful? Yes | No 5 out of 5 Alpine KTP-445 Power Pack Written By Anonymous, Greenville, SC on Sunday, December 23, 2012 Crutchfield Customer Review (What's this?) what easy to hook up. Was this review helpful? Yes | No 4 out of 5 Power pack Written By Kenneth, Sand Point Alaska on Friday, December 21, 2012 Crutchfield Customer Review (What's this?) What a simple and easy upgrade plug and play Pros: Took my deck to new cleaner highs and drew workload away along with heat ,as my dash gets warm during winter with heater blasting .now it's clear and fun competing with my subs on a new scale Cons: None it's perfect and all my ears safely need Was this review helpful? Yes | No 5 out of 5 Great item Written By Duffy, Wv on Saturday, September 08, 2012 Crutchfield Customer Review (What's this?) Great product! Easy to install and works well! Pros: See above Cons: Non Was this review helpful? Yes | No 5 out of 5 Great little amp Written By Birdsquare, Louisville, KY on Wednesday, May 23, 2012 Crutchfield Customer Review (What's this?) Great amp for the price and ease of install. Have an amped sub and an Alpine CDE-123 in my '07 Odyssey and this helps the other speakers fill in the mids and highs. Install note: Definitely needs power to come from the battery. Had this hooked up to the power provided to the factory radio and sounded puny. Ran fused wire direct to battery and it made a HUGE difference. Sounds nice and full up to as loud as I can stand it. Pros: Size, ease of install, cost Cons: Probably damaging my ears 1 out of 1 people found this helpful Was this review helpful? Yes | No 1 out of 5 Mine must have issues Written By John, San Jose, CA on Wednesday, May 23, 2012 Yes, it was easy to install, and yes, it makes my speakers sound better. The bad part is when I leave my truck in the sun all day at work, I get no sound from the stereo until the A/C has a chance to cool the amp off. Then speakers come back about 1 every 5 minutes, or just about as long as it takes me to get home. Of course I'd have to take it out again to have it serviced. Not worth the trouble for the cost. I'll continue to park in the shade and get leaves, pollen, and bird poop all over my truck. Was this review helpful? Yes | No 5 out of 5 Alpine Power pack Written By Brian G, Plainville, CT on Friday, May 18, 2012 Crutchfield Customer Review (What's this?) I can probably take apart my dash and system blindfolded by now, but doesn't take away the fact that this thing is extremely easy to install. Literally just plug it in between stereo and cars wire harness stick it behind dash and your good to go. The wires are long enough to find somewhere behind the dash to mount it although I was able to pack it right behind the head unit. Connected to HD137BT, the amp provides a nice boost from just the head unit. and loud enough so you can't hear your passenger talking when turned up. For those looking for a an easy to install boost in volume/clarity, this is a no-brainer. Pros: Too easy to install Compact Nice boost in volume/clarity No need to run separate power/remote/speaker wires Cons: If you understand what you are getting, there are no cons. Maybe include second set of shorter wires? 1 out of 2 people found this helpful Was this review helpful? Yes | No 5 out of 5 Great Power Boost in a Small Pack Written By Nicky, Lowell, MA on Tuesday, May 08, 2012 Crutchfield Customer Review (What's this?) Breathes a little life into my factory speakers (2005 Dodge Magnum 6 speaker). Takes up VERY little space under the steering column. Pros: Small amount of space required, easy to install. Cons: None. Was this review helpful? Yes | No 5 out of 5 Very nice Written By Paleface, Mililani, HI on Monday, May 07, 2012 Crutchfield Customer Review (What's this?) Absolutely the easiest thing you will ever install for a small upgrade. Was this review helpful? Yes | No 5 out of 5 Great upgrade for 2009-2012 F150 Written By F150driver, Yakima, WA on Wednesday, April 25, 2012 Crutchfield Customer Review (What's this?) After adapting this amp with a bluetooth harness to matcu the factory head unit, I have much better sound over stock sound, It took me about 2 hours to install...1 hour to mate the adapter wires to the amp wires and 1 hour to install it in the truck. Pros: quick and easy upgrade for thos that don't want to spend a lot of money. Was this review helpful? Yes | No 4 out of 5 Alpine KTP-445 Power Pack Written By Allan, Saint Cloud, Florida on Sunday, April 22, 2012 Crutchfield Customer Review (What's this?) Good upgrade & easy to install Pros: simple hook up Cons: some dash's are tight & requires a little imagination on were to install to prevent any vibration within the dash system because of its size Was this review helpful? Yes | No 5 out of 5 Alpine Power Pack KTP-445 Written By Keith, Andover, MN. on Tuesday, April 10, 2012 Crutchfield Customer Review (What's this?) The Alpine KTP-445 Power Pack is the best way to add real power to your speakers with out the need to pull new wire everywhere, and it adds real clean, noticeable power. Ultra easy to hide and as easy as plugging in two wire harnesses together to add awesome sound. Great product !!! Pros: Ease of hiding , ease of installing, true bang for your buck. Cons: none Was this review helpful? Yes | No 1-20 of 98 >> For a more in-depth review and enhanced detailed information on the Alpine KTP-445 Power Pack, please visit the Crutchfield website product page (/S-Cpapca0qhRr/p_500KTP445/Alpine-KTP-445-Power-Pack.html ). Sorry, the Alpine KTP-445 Power Pack is no longer available for purchase. Shop all All Car Amplifiers Looking for a similar item? Alpine KTP-445A Power Pack $129.99 7 people say Or, you can still... Write a review Download product manual Go Front
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. Our take on the Alpine KTP-445 Power Pack by Zak Billmeier The KTP-445 connects to any 2005 and newer Alpine headunit that uses a black power harness. It will not work with the CDE-100 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. Best of all, you install the compact Power Pack by plugging it directly into your Alpine receiver's wire harness — no extra wires to run, and no other connections needed. Note: The KTP-445 Power Pack won't work in systems where an outboard factory amplifier is still active. You'll have to bypass the factory amp if you want to upgrade your power with the KTP-445. Please contact an Advisor at 1-888-955-6000 to check compatibility if you have any questions. See more info on this item Highlights:plug-and-play compact Class D amplifier for Alpine in-dash receivers4-channel amplifier45 watts RMS x 4 at 4 ohms (CEA-2006 compliant) selectable gain switch (high/low)fuse: 15A2-9/16"W x 1-1/2"H x 7-13/16"Dwarranty: 1 yearOur 60-day money-back guaranteeShop all Alpine Car Amplifiers Note: Sorry, Crutchfield cannot ship Alpine products to Guam or Puerto Rico.
Hands-on research from the Crutchfield Labs (what are the Labs?) Features and specs chart | What’s in the box? | In-depth notes Features and Specs Features and Specs Performance RMS Power Output (Watts x Channels) Loading... 45 x 4 Peak Power Output (Watts x Channels) Loading... --- Power at 2 Ohms (Watts x Channels) Loading... N/A Bridged Power (Watts x Channels) Loading... N/A Minimum Impedance Bridged Loading... N/A Minimum Impedance Unbridged Loading... 4 Best Frequency Response Loading... 20-20k Hz THD at Rated RMS Power Loading... 1% Signal to Noise Ratio Loading... N/A Input Voltage Loading... 14.4v Features Amplifier Class Loading... D Low-Pass Crossover Frequency Loading... N/A Low-Pass Slope (dB/octave) Loading... N/A High-Pass Crossover Frequency Loading... N/A High-Pass Slope (dB/octave) Loading... N/A Bass Boost Loading... No Bass Boost Frequency Loading... N/A Fan Cooled Loading... No Fuse Rating Loading... 15 Speaker Level Inputs Loading... Harness Preamp Outputs Loading... No Width (inches) Loading... 2-5/8 Height (inches) Loading... 1-1/2 Depth (inches) Loading... 7-13/16 Parts Warranty Loading... 1 Year Labor Warranty Loading... 1 Year Product Research Product Research What's in the box? Download owner's manual Head Unit Power Pack (45W x 4 RMS) with attached 38" harness terminated by a male Alpine connector on one end and an attached 29" harness terminated by a female Alpine connector on other end Instructions 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 open the box, verify contents, 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. Features Overview: The Alpine KTP-445 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 headunit. The KTP-445 amplifies your Alpine headunit's power output, resulting in a 150 percent power increase over the original power from the headunit's built-in amplifier. Compatibility: The KTP-445 connects to any 2005 and newer Alpine headunit that has a black power harness. Please check with your Crutchfield Product Advisor to confirm compatibility. Installation: Since the KTP-445 is small and compact, it installs behind your Alpine headunit in the dash of most vehicles. Its plug-and-play connections keep it simple, without requiring additional wiring or special tuning. The male harness connects to the rear plug on your Alpine headunit while the female harness plugs into your Alpine headunit's harness (included with your Alpine headunit). Then connect the wires from the Alpine headunit's harness to your factory 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-445. Controls: A high/low gain switch on the bottom of the amplifier allows for proper gain settings, whether or not a subwoofer is part of the system.
Video: Installing the Alpine KTP-445 Power Pack Video: Installing the Alpine KTP-445 Power Pack Robert Ferency-Viars 8/24/2009 This video demonstrates how easy it is to install the Alpine KTP-445 Power Pack amplifier module. The Power Pack gives you the power and improved sound of an external amplifier at a fraction of the...
5 out of 5 Packs Some Punch !!!!! Written By paryted, Lanoka Harbor on Tuesday, April 30, 2013 Crutchfield Customer Review (What's this?) This amplifier was installed in my 2005 Wrangler to make it possible to hear my stereo in the summer when the top will come off. I bought this amp because of the alpine head unit I purchased and the stated plug n play installation. It went even smoother than stated. The 4 channels at 45 watts are more than sufficient to power the set of infinity speakers in my jeep. The sound is crystal clear. The small size made it possible to install this amp behind my dash where it is totally out of sight because if you have a jeep you know that space is extremely scarce especially as the size of the system itself grows and we all know about that !!! Pros: Ease of install. Small size. Pre wired. Cons: Only works with alpine head units Was this review helpful? Yes | No
4 out of 5 Pretty Good. Written By Nick D, Riverside, PA on Monday, March 18, 2013 Crutchfield Customer Review (What's this?) Did not provide a substantial boost in volume, but it did clean up the sound and improve clarity at higher levels. Plug and play with the Alpine CDE-133BT. For the ease of installation and the size you can't really go wrong. Crutchfield is great as usual. shipped quick and works fine even though i got an open-box deal. Was this review helpful? Yes | No
4 out of 5 Alpine KTP-445 Power Pack Written By Jeff A, MA on Sunday, March 10, 2013 not plug and play compatible with Alpine CDE-110 (gray connector). you can cut off the connectors on either end of the amplifier and splice in though. hook the blue/white wire to switched 12V/ignition. If you only hook up the red wire to ignition the amplifier won't power on. 1 out of 1 people found this helpful Was this review helpful? Yes | No
3 out of 5 Make sure this is the one you need Written By Preston, Palm Bay, Fl on Wednesday, February 27, 2013 Crutchfield Customer Review (What's this?) As the title says, make sure this is the amp you need. The connector on this unit only fits alpine units with the black connector, and not the gray. I thought since my receiver was new enough that it would fit. Wrong ! you will end up having to wire it manually just like you would the 445U. Also this unit has less advanced controls then the the 445U Personally i dont see why any one would get this unit any more, especially if they have the gray harness connectors. Pros: Same wattage as 445U, Quick Connect if you have black connectors. Cons: Less audio controls, more wire splicing if your using gray connectors or non-alpine deck. Was this review helpful? Yes | No
5 out of 5 Great Amp Written By Billy, Massapequa Park, NY on Friday, February 15, 2013 Crutchfield Customer Review (What's this?) This is a great amp. Extremely easy to install. Cables are nice and long so i mounted mine in my glove box. I have a 6 speaker system so i was skeptical but this amp does a very nice job, not as good as I'm sure an independent amp would do on the 4 speakers then another for the two, but all in all i'm very happy. Pros: Compact size. Cable length Cons: None so far Was this review helpful? Yes | No
4 out of 5 NICE UPGRADE! Written By PAT, TEXAS on Wednesday, February 13, 2013 Crutchfield Customer Review (What's this?) IT DOES EVERY THING IT SHOULD . IT WONT ROCK THE HOUSE DOWN, BUT ITS DEFINITELY A BIG IMPROVEMENT OVER STOCK. I THINK ALL AMPS NEED TO BE AS EASY TO PLUG IN AND USE . Was this review helpful? Yes | No
5 out of 5 Works Great Written By Rockin Ranger, Magnolia De on Friday, February 01, 2013 Crutchfield Customer Review (What's this?) Works Great plug and play puts a little more bump to the 4 Kicker 2way components pulled the sat-rec behind the glove box in my Ranger it fit real nice plugged it in to the hd137bt and boom EASY Pros: amps 4 dummies lol Cons: none Was this review helpful? Yes | No
5 out of 5 Alpine KTP-445 Power Pack Written By Anonymous, Kyle, TX on Monday, January 21, 2013 Crutchfield Customer Review (What's this?) Makes a big difference in the sound. Paired it up with my alpine 121 I had put in last year. Now the system is louder, is able to keep up with the sub I have on a 500w amp, and is able to drown out the jake brake. The old factory system was drowned out by the engine alone with the windows down. (no, I did not take out the muffler or anything like that). The power back should be bought togather with the alpine head. Pros: Very easy to install, no wires to run, and it fits right behind the dash. Cons: No crossover controls, too bad it can't be hooked up to an EQ like traditional amps. Was this review helpful? Yes | No
5 out of 5 Way Easier than installing an amp! Written By Anonymous, Green Bay, WI on Friday, January 18, 2013 Plugged into Alpine HD137BT and sound was way better than factory system...put in aftermarket speakers and the sound really shines! Pros: Super easy install and nice power bump up Was this review helpful? Yes | No
5 out of 5 Alpine KTP-445 Power Pack Written By Anonymous, Greenville, SC on Sunday, December 23, 2012 Crutchfield Customer Review (What's this?) what easy to hook up. Was this review helpful? Yes | No
4 out of 5 Power pack Written By Kenneth, Sand Point Alaska on Friday, December 21, 2012 Crutchfield Customer Review (What's this?) What a simple and easy upgrade plug and play Pros: Took my deck to new cleaner highs and drew workload away along with heat ,as my dash gets warm during winter with heater blasting .now it's clear and fun competing with my subs on a new scale Cons: None it's perfect and all my ears safely need Was this review helpful? Yes | No
5 out of 5 Great item Written By Duffy, Wv on Saturday, September 08, 2012 Crutchfield Customer Review (What's this?) Great product! Easy to install and works well! Pros: See above Cons: Non Was this review helpful? Yes | No
5 out of 5 Great little amp Written By Birdsquare, Louisville, KY on Wednesday, May 23, 2012 Crutchfield Customer Review (What's this?) Great amp for the price and ease of install. Have an amped sub and an Alpine CDE-123 in my '07 Odyssey and this helps the other speakers fill in the mids and highs. Install note: Definitely needs power to come from the battery. Had this hooked up to the power provided to the factory radio and sounded puny. Ran fused wire direct to battery and it made a HUGE difference. Sounds nice and full up to as loud as I can stand it. Pros: Size, ease of install, cost Cons: Probably damaging my ears 1 out of 1 people found this helpful Was this review helpful? Yes | No
1 out of 5 Mine must have issues Written By John, San Jose, CA on Wednesday, May 23, 2012 Yes, it was easy to install, and yes, it makes my speakers sound better. The bad part is when I leave my truck in the sun all day at work, I get no sound from the stereo until the A/C has a chance to cool the amp off. Then speakers come back about 1 every 5 minutes, or just about as long as it takes me to get home. Of course I'd have to take it out again to have it serviced. Not worth the trouble for the cost. I'll continue to park in the shade and get leaves, pollen, and bird poop all over my truck. Was this review helpful? Yes | No
5 out of 5 Alpine Power pack Written By Brian G, Plainville, CT on Friday, May 18, 2012 Crutchfield Customer Review (What's this?) I can probably take apart my dash and system blindfolded by now, but doesn't take away the fact that this thing is extremely easy to install. Literally just plug it in between stereo and cars wire harness stick it behind dash and your good to go. The wires are long enough to find somewhere behind the dash to mount it although I was able to pack it right behind the head unit. Connected to HD137BT, the amp provides a nice boost from just the head unit. and loud enough so you can't hear your passenger talking when turned up. For those looking for a an easy to install boost in volume/clarity, this is a no-brainer. Pros: Too easy to install Compact Nice boost in volume/clarity No need to run separate power/remote/speaker wires Cons: If you understand what you are getting, there are no cons. Maybe include second set of shorter wires? 1 out of 2 people found this helpful Was this review helpful? Yes | No
5 out of 5 Great Power Boost in a Small Pack Written By Nicky, Lowell, MA on Tuesday, May 08, 2012 Crutchfield Customer Review (What's this?) Breathes a little life into my factory speakers (2005 Dodge Magnum 6 speaker). Takes up VERY little space under the steering column. Pros: Small amount of space required, easy to install. Cons: None. Was this review helpful? Yes | No
5 out of 5 Very nice Written By Paleface, Mililani, HI on Monday, May 07, 2012 Crutchfield Customer Review (What's this?) Absolutely the easiest thing you will ever install for a small upgrade. Was this review helpful? Yes | No
5 out of 5 Great upgrade for 2009-2012 F150 Written By F150driver, Yakima, WA on Wednesday, April 25, 2012 Crutchfield Customer Review (What's this?) After adapting this amp with a bluetooth harness to matcu the factory head unit, I have much better sound over stock sound, It took me about 2 hours to install...1 hour to mate the adapter wires to the amp wires and 1 hour to install it in the truck. Pros: quick and easy upgrade for thos that don't want to spend a lot of money. Was this review helpful? Yes | No
4 out of 5 Alpine KTP-445 Power Pack Written By Allan, Saint Cloud, Florida on Sunday, April 22, 2012 Crutchfield Customer Review (What's this?) Good upgrade & easy to install Pros: simple hook up Cons: some dash's are tight & requires a little imagination on were to install to prevent any vibration within the dash system because of its size Was this review helpful? Yes | No
5 out of 5 Alpine Power Pack KTP-445 Written By Keith, Andover, MN. on Tuesday, April 10, 2012 Crutchfield Customer Review (What's this?) The Alpine KTP-445 Power Pack is the best way to add real power to your speakers with out the need to pull new wire everywhere, and it adds real clean, noticeable power. Ultra easy to hide and as easy as plugging in two wire harnesses together to add awesome sound. Great product !!! Pros: Ease of hiding , ease of installing, true bang for your buck. Cons: none Was this review helpful? Yes | No
Shop all All Car Amplifiers Looking for a similar item? Alpine KTP-445A Power Pack $129.99 7 people say
