---
product_id: 1161942
title: "Alpine KTP-445A Head Unit Power Pack"
brand: "alpine"
price: "₱38963"
currency: PHP
in_stock: true
reviews_count: 8
category: "Alpine"
url: https://www.desertcart.ph/products/1161942-alpine-ktp-445a-head-unit-power-pack
store_origin: PH
region: Philippines
---

# 180W RMS power output Plug-and-play Alpine head unit compatibility 20-20,000 Hz frequency response Alpine KTP-445A Head Unit Power Pack

**Brand:** alpine
**Price:** ₱38963
**Availability:** ✅ In Stock

## Summary

> 🎵 Upgrade your ride’s sound game with Alpine’s stealthy power pack!

## Quick Answers

- **What is this?** Alpine KTP-445A Head Unit Power Pack by alpine
- **How much does it cost?** ₱38963 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/1161942-alpine-ktp-445a-head-unit-power-pack)

## Best For

- alpine enthusiasts

## Why This Product

- Trusted alpine brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Stealth Amp:** Small form factor fits discreetly behind your dash or glove box for a sleek install.
- • **Crystal Clear Sound:** Wide 20Hz-20kHz frequency range ensures rich, distortion-free audio clarity.
- • **Effortless Power Boost:** Plug-and-play design delivers a clean 45W per channel without complex wiring.
- • **Perfect Mid-Range Punch:** Optimized to enhance mids and highs when paired with a powered subwoofer.
- • **Seamless Alpine Integration:** Designed specifically for 2005+ Alpine head units for flawless compatibility.

## Overview

The Alpine KTP-445A is a compact, plug-and-play 4-channel amplifier delivering 180 watts RMS power with a full 20-20,000 Hz frequency response. Engineered for 2005 and newer Alpine head units, it boosts audio clarity and volume without complicated installation, making it the ideal upgrade for millennials seeking premium sound quality and a sleek, stealthy setup in their vehicles.

## Description

desertcart.com: Alpine KTP-445A Head Unit Power Pack : Electronics

Review: This Thing Surprised and Pleased Me! - I did not want an amplifier. I did not want an amplifier. I did not want an amplifier. There. Now that that is out of the way... The KTP-445 comes in two versions. This review is for the "A" version (KTP-445A) which is wired for Alpine head units. It will work just fine with other brands or older Alpines, but you have to cut off the nice connectors and rewire them to fit your unit. For other brand head units (or Alpines made prior to 2005) you need to look at the KTP-445U (universal fit). I have this installed in my 2003 Jeep Wrangler and it is just enough to make my system usable with the top down while rolling at Interstate speeds. These seems to be a lot of confusion about this, so I will try to clear some of it up. This is not a 45x4W RMS amp! An aftermarket head normally has a small amount of amplification on board, and this simply boosts the TOTAL to 45W by adding to what it already there. On an Alpine this creates the full 45W per channel. It does this inline via a very long harness that is included in the box. The amp lives in-line between your aftermarket harness adapter and your head unit. You plug the amp's harness into the adapter harness. You plug the other end into the amp. Then you plug the other harness into the amp and clip that into your head unit's socket. No RCA plugs are used. Only the regular, main socket on the head is used by this amp. It is literally and truly a "plug and play" system. It supplies some surprisingly clean sounding power to your head unit. If you want more power but not some child-like, booty-smashing, "acoustic hair dryer" sound system in your car, this works well and is easy to set up. My system works very well together. Here is the basic setup so that you can see how this mini amp can fit in with other components, power-wise: • Alpine UTE-52BT Bluetooth Mechless Digital Receiver • Alpine KTP-445A Head Unit Power Pack • Alpine MRV-M250 Mono V-Power Digital Amp • Polk db521 5.25" Marine Coaxial Speakers • Polk db5251 5.25" Marine Component Woofers • Polk db5251 2" Marine Component Tweeters • Rockford Fosgate P3SD4-8 8" Shallow 4-Ohm DVC Subwoofer The Polk speakers work very well in an un-amped, stock system; they sound great, if a little bit bright. However, they can handle a small amount of amplification with no ill effects. This Alpine mini-amp does a great job of powering these speakers; you get some fairly solid power without distortion or noise. Paired with my Alpine mono amp to my subwoofer and my system sounds pretty darn good. Or at least *I* think so. ;-) I would strongly recommend this Alpine KTP-445A (or the U version, if applicable) for anyone who has moved beyond their stock head unit and speakers but who is not yet convinced that a sound system that can power a small town is what they really want in their car, or for those who successfully installed an Alpine head unit and who are ready for a bit more power without the wiring hassles of a regular, RCA level 4 channel amplifier. It is not too spendy, it is very easy to install, it works well and is well made. I am very pleased with mine. Notes specifically for Jeep TJ owners (Wrangler, 1997-2006) who are looking at this: This thing is great for a stealthy system. I can fit my MRV-M250 mono amp on the same bracket with this little guy and stuff them both up under the dash off the two bolts on the firewall for the tilt steering. (That seems to be the default place for amp mounting on a TJ if you want it hidden and off the floor. Do a Google image search for "Skinny Pedal Bracket" to see how to make one of these. You will have to figure out how to fit all that on the bracket, but once you have it figured out it *will* work.) Alpine has told me on the phone that both the amps listed above can safely be mounted inverted, so long as there is adequate air flow around them. The rep also suggested going to a hobby shop and buying a very thin, flexible sheet of Lexan/polycarbonate. (NOTE: not polystyrene, which melts and puts off some toxic fumes!) He said to fit that up above the amps to make a sort of umbrella to keep any rain off the amps. Yes, the Alpine rep owned a TJ, too. Nice! Alternatively, if you do not have a sub in your Jeep, or if you already have a sub amp under the dash and do not want to have to re-do all that work to fit the KTP-445A up in there with it, I have found that on TJs with the HVAC system using knobs (pretty much all of them) that this *can* be fit behind the HVAC control module, which is just below the head unit. I tried this, and it *does* fit. But it is really tight, so I would worry about heat right next to those vacuum lines off the selector knob. For the 1997 with the sliders I have no idea, but have heard that that unit is even more shallow than the knobbed version, so maybe that would be a good alternative. I have found that this mini-amp can also be fit behind and to the left of the glove box, but you have to be a magician to get it in there. This is so small that you also might be able to mount it to the firewall above the airbag sensor box at the very front of the center console, just behind the lower edge of the dash center bezel. Lastly, on my particular 2003 this amp can be made to fit on the tub wall behind the driver dash speaker. You have to use zip ties for that, but it works. I have seen this amp set up in this location in a couple of other TJs around here. It works okay, but I have the Polk component speakers, and this is where I mounted up my crossover on that side. There is not room for both, so far as I can see. I chose the Polk speakers because they are made for use on boats, they sound great and they are priced well. When I purchased them I did not know anything about RMS or the like, and I really like them. I do not want to add a powerful 4 channel amp or I will have to replace them. This small Alpine amp works really well with these Polk DB series speakers and still allows me to run the sub and amp I want with no problems. Further, if you want to add a 4 channel and more powerful speakers, this KTP-445 amp can be left in place as it does not use up any plugs other than the one used to hook the head unit up in the first place. For my TJ this little amp has been a solid, inexpensive upgrade that is pretty easy to hide, since we all leave these vehicles sitting open for any scumbag to "investigate" – stealthiness matters, and this amp is about the size of a walkie-talkie.
Review: Perfect EZ Upgrade for Factory or Mild Systems - If you already own or plan to buy an Alpine head unit, the Alpine KTP-445A Power Pack Amplifier is hands down one of the easiest and most effective upgrades you can make. Installation is foolproof. This amp is designed to be plug-and-play with Alpine head units, requiring zero custom wiring or technical know-how. If you can handle basic plug in connections, you can handle this. If you're running stock speakers or aftermarket speakers equivalent to factory specs, this little amp brings them to life. You’ll notice an immediate boost in volume, clarity, and punch compared to running speakers straight off the head unit. Where this unit SHINES is if you have or plan to use a modest self or separately powered subwoofer for the bass, and then set your Alpine head unit’s high-pass filter (HPF) around 80Hz. By letting the sub handle the low frequencies and allowing this amp to use its power to focus on mids and highs, it absolutely punches way above its weight class. The result is clean, dynamic sound that stays clear even at higher volumes. Very clean and crisp. What It’s Not For: Don’t expect it to power heavy-duty, high-wattage speakers. That’s not its purpose. We’re taking 45 watts per channel. It’s a ridiculously simple, no-fuss upgrade that delivers noticeable improvement by itself and a game changer when paired with a separately powered subwoofer. Great job Alpine.

## Features

- Frequency response: 20-20,000 Hz
- RMS power output: 180 watts
- For select 2005 and newer Alpine head units

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00CQBY174 |
| Best Sellers Rank | #149,817 in Electronics ( See Top 100 in Electronics ) #371 in Car Multichannel Amplifiers |
| Brand Name | Alpine |
| Customer Reviews | 4.5 4.5 out of 5 stars (462) |
| Global Trade Identification Number | 00793276012395 |
| Included Components | KTP-445A |
| Item Dimensions | 9 x 8 x 4 inches |
| Item Weight | 2.5 Pounds |
| Manufacturer | Alpine |
| Maximum Supply Voltage | 12 Volts |
| Minimum Supply Voltage | 12 Volts |
| Model | KTP-445A |
| Mounting Type | Floor Mount |
| Number of Channels | 4 |
| Output Power | 180 Watts |
| Package Type Name | carton |
| Specification Met | Cea-2006 Compliant |
| UPC | 793276012395 |
| Unit Count | 1.0 Count |
| Voltage | 12 Volts |
| Warranty Description | 1-Year Manufacturer Warranty |

## Product Details

- **Item dimensions L x W x H:** 9 x 8 x 4 inches
- **Manufacturer:** Alpine
- **Maximum Supply Voltage:** 12 Volts
- **Minimum Supply Voltage:** 12 Volts
- **Voltage:** 12 Volts

## Images

![Alpine KTP-445A Head Unit Power Pack - Image 1](https://m.media-amazon.com/images/I/41fJoK+CuhL.jpg)

## Questions & Answers

**Q: Will this work with a kenwood stereo?**
A: It will be plug and play if your receiver has the same wiring on the back as an alpine receiver. If it doesn't it could still work if you cut the connector off of the amp on both sides and manually wire them together to the cars wiring and you stereos wiring. The wiring on the amp is no different than any modern receiver. Two power wires, a ground, and speaker wires.

**Q: Does this really only use a 15amp fuse? Asking because if so, not way it is 45w x4 rms / 90w x 4 peak with that low of a fuse.**
A: Yes, it is only a 15 amp fuse. The amplifier does not produce 45W RMS, it takes the feed from your factory stereo and increases it to 45W. Its closer to a 25W RMS x 4 amp. With that said, I put one in my truck and one in my Jeep and I love them.

**Q: If I plan to install this and want to replace my factory speaker wiring, where would I splice into the power pack's harness?  Thanks!**
A: The harness that is plugged to Alpine head unit, plugs into this unit and the unit plugs back to the Alpine head unit. This is for Alpine plug and play, no splicing. If you do not have Alpine head unit, you will need the KTP-445U Universal Power Pack amplifies both an aftermarket or factory installed head units.

**Q: Can be uses whith alpine spr-50 c 5.25-inch and alpine ute-52bt**
A: Yes it can

## Customer Reviews

### ⭐⭐⭐⭐⭐ This Thing Surprised and Pleased Me!
*by P***M on December 6, 2014*

I did not want an amplifier. I did not want an amplifier. I did not want an amplifier. There. Now that that is out of the way... The KTP-445 comes in two versions. This review is for the "A" version (KTP-445A) which is wired for Alpine head units. It will work just fine with other brands or older Alpines, but you have to cut off the nice connectors and rewire them to fit your unit. For other brand head units (or Alpines made prior to 2005) you need to look at the KTP-445U (universal fit). I have this installed in my 2003 Jeep Wrangler and it is just enough to make my system usable with the top down while rolling at Interstate speeds. These seems to be a lot of confusion about this, so I will try to clear some of it up. This is not a 45x4W RMS amp! An aftermarket head normally has a small amount of amplification on board, and this simply boosts the TOTAL to 45W by adding to what it already there. On an Alpine this creates the full 45W per channel. It does this inline via a very long harness that is included in the box. The amp lives in-line between your aftermarket harness adapter and your head unit. You plug the amp's harness into the adapter harness. You plug the other end into the amp. Then you plug the other harness into the amp and clip that into your head unit's socket. No RCA plugs are used. Only the regular, main socket on the head is used by this amp. It is literally and truly a "plug and play" system. It supplies some surprisingly clean sounding power to your head unit. If you want more power but not some child-like, booty-smashing, "acoustic hair dryer" sound system in your car, this works well and is easy to set up. My system works very well together. Here is the basic setup so that you can see how this mini amp can fit in with other components, power-wise: • Alpine UTE-52BT Bluetooth Mechless Digital Receiver • Alpine KTP-445A Head Unit Power Pack • Alpine MRV-M250 Mono V-Power Digital Amp • Polk db521 5.25" Marine Coaxial Speakers • Polk db5251 5.25" Marine Component Woofers • Polk db5251 2" Marine Component Tweeters • Rockford Fosgate P3SD4-8 8" Shallow 4-Ohm DVC Subwoofer The Polk speakers work very well in an un-amped, stock system; they sound great, if a little bit bright. However, they can handle a small amount of amplification with no ill effects. This Alpine mini-amp does a great job of powering these speakers; you get some fairly solid power without distortion or noise. Paired with my Alpine mono amp to my subwoofer and my system sounds pretty darn good. Or at least *I* think so. ;-) I would strongly recommend this Alpine KTP-445A (or the U version, if applicable) for anyone who has moved beyond their stock head unit and speakers but who is not yet convinced that a sound system that can power a small town is what they really want in their car, or for those who successfully installed an Alpine head unit and who are ready for a bit more power without the wiring hassles of a regular, RCA level 4 channel amplifier. It is not too spendy, it is very easy to install, it works well and is well made. I am very pleased with mine. Notes specifically for Jeep TJ owners (Wrangler, 1997-2006) who are looking at this: This thing is great for a stealthy system. I can fit my MRV-M250 mono amp on the same bracket with this little guy and stuff them both up under the dash off the two bolts on the firewall for the tilt steering. (That seems to be the default place for amp mounting on a TJ if you want it hidden and off the floor. Do a Google image search for "Skinny Pedal Bracket" to see how to make one of these. You will have to figure out how to fit all that on the bracket, but once you have it figured out it *will* work.) Alpine has told me on the phone that both the amps listed above can safely be mounted inverted, so long as there is adequate air flow around them. The rep also suggested going to a hobby shop and buying a very thin, flexible sheet of Lexan/polycarbonate. (NOTE: not polystyrene, which melts and puts off some toxic fumes!) He said to fit that up above the amps to make a sort of umbrella to keep any rain off the amps. Yes, the Alpine rep owned a TJ, too. Nice! Alternatively, if you do not have a sub in your Jeep, or if you already have a sub amp under the dash and do not want to have to re-do all that work to fit the KTP-445A up in there with it, I have found that on TJs with the HVAC system using knobs (pretty much all of them) that this *can* be fit behind the HVAC control module, which is just below the head unit. I tried this, and it *does* fit. But it is really tight, so I would worry about heat right next to those vacuum lines off the selector knob. For the 1997 with the sliders I have no idea, but have heard that that unit is even more shallow than the knobbed version, so maybe that would be a good alternative. I have found that this mini-amp can also be fit behind and to the left of the glove box, but you have to be a magician to get it in there. This is so small that you also might be able to mount it to the firewall above the airbag sensor box at the very front of the center console, just behind the lower edge of the dash center bezel. Lastly, on my particular 2003 this amp can be made to fit on the tub wall behind the driver dash speaker. You have to use zip ties for that, but it works. I have seen this amp set up in this location in a couple of other TJs around here. It works okay, but I have the Polk component speakers, and this is where I mounted up my crossover on that side. There is not room for both, so far as I can see. I chose the Polk speakers because they are made for use on boats, they sound great and they are priced well. When I purchased them I did not know anything about RMS or the like, and I really like them. I do not want to add a powerful 4 channel amp or I will have to replace them. This small Alpine amp works really well with these Polk DB series speakers and still allows me to run the sub and amp I want with no problems. Further, if you want to add a 4 channel and more powerful speakers, this KTP-445 amp can be left in place as it does not use up any plugs other than the one used to hook the head unit up in the first place. For my TJ this little amp has been a solid, inexpensive upgrade that is pretty easy to hide, since we all leave these vehicles sitting open for any scumbag to "investigate" – stealthiness matters, and this amp is about the size of a walkie-talkie.

### ⭐⭐⭐⭐⭐ Perfect EZ Upgrade for Factory or Mild Systems
*by R***. on January 3, 2025*

If you already own or plan to buy an Alpine head unit, the Alpine KTP-445A Power Pack Amplifier is hands down one of the easiest and most effective upgrades you can make. Installation is foolproof. This amp is designed to be plug-and-play with Alpine head units, requiring zero custom wiring or technical know-how. If you can handle basic plug in connections, you can handle this. If you're running stock speakers or aftermarket speakers equivalent to factory specs, this little amp brings them to life. You’ll notice an immediate boost in volume, clarity, and punch compared to running speakers straight off the head unit. Where this unit SHINES is if you have or plan to use a modest self or separately powered subwoofer for the bass, and then set your Alpine head unit’s high-pass filter (HPF) around 80Hz. By letting the sub handle the low frequencies and allowing this amp to use its power to focus on mids and highs, it absolutely punches way above its weight class. The result is clean, dynamic sound that stays clear even at higher volumes. Very clean and crisp. What It’s Not For: Don’t expect it to power heavy-duty, high-wattage speakers. That’s not its purpose. We’re taking 45 watts per channel. It’s a ridiculously simple, no-fuss upgrade that delivers noticeable improvement by itself and a game changer when paired with a separately powered subwoofer. Great job Alpine.

### ⭐⭐⭐⭐⭐ Works Great in Miata with Alpine CDE-HD148BT Head Unit
*by G***H on May 30, 2025*

I chose this amplifier specifically because it was both 2 and 4ohm stable, compact and I had a compatible Alpine head unit. Subject vehicle: 1994 Mazda Miata with door speakers (Kicker 6.5" 42PSC652 2ohm, 92 dB sensitivity) and headset speakers (two pairs of 8 ohm 3rd Millennium Millennium-5 wired in parallel for 4 ohm, 88 dB sensitivity.) My head unit is a 2017-era Alpine CDE-HD148BT with its harness pigtail soldered to a Metra 70-7901 adapter, which plugs into the two plugs of the factory body-side harness. Connecting the new amplifier was easy: unplug the harness from the head unit and plug it instead into the matching end of one amp harness. Then plug the other amp harness into the head unit. However, stashing the amp in the car's confined space took some creativity. The long amp harnesses can be a blessing or curse: they permit greater latitude for amp placement, but if you place it close to the head unit - as I did - then you have a lot of wiring to route and stuff into crevices. I've read of some people stashing the amp under the passenger seat or under the passenger footwell carpet against the tunnel, but I didn't like either options. The best place I found was behind the right side of the storage pocket under the head unit. I placed it lengthwise along the axis of the car - one end tucked tight against then HVAC plenum and the other tight against the storage pocket - and stuck felt padding on the amplifier case anywhere it might rattle against metal. Clearance was very tight - I'd be surprised if it was even 1/8" - and involved experimentally wrapping and stuffing the harnesses into any open space I could find. I am quite satisfied with this unit: both sound quality and volume are the best in the 15 years I've had the car. Obviously, my setup would not satisfy cravings for deep bass; if I ever want that I'll add a subwoofer and second amplifier.

## Frequently Bought Together

- Alpine KTP-445A Head Unit Power Pack
- Alpine UTE-73BT Mech-Less Digital Media Receiver with Bluetooth® Wireless Technology

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*Product available on Desertcart Philippines*
*Store origin: PH*
*Last updated: 2026-05-27*