Alpine KTP-445A 4-Channel Head Unit Power Pack Amplifier

Model Number: KTP-445A
UPC: 793276012395
Model Number: KTP-445A
UPC: 793276012395

Alpine KTP-445A 4-Channel Head Unit Power Pack Amplifier

  • 45 Watts x 4 @ 4″/2″
  • For select 2005 and newer Alpine head units
  • Compact size
  • Compact Class D amplifier for Alpine in-dash receivers
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Product Description

Features & Specifications



Alpine KTP-445A 4-Channel Head Unit Power Pack Amplifier

Upgrade Your Head Unit Power with a Alpine KTP-445A amplifier. Add higher output and more dynamic response with this easy-to-install head unit power upgrade. The KTP-445 amplifies the head unit power output, resulting in a 150 percent power increase over the original power from the head units built-in amplifier. The Alpine KTP-445 connects any 2005 and newer Alpine head unit that has a black power harness. *Contact your local authorized Alpine retailer to confirm compatibility.

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 Alpine 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.

Easy Installation and Set Up

The KTP-445 fits behind the head unit in the dash of most vehicles. It’s small and compact at only 6″ x 2″ x 1-1/8″. Its plug-and-play installation keeps it simple, without requiring additional wiring or special tuning. A high/low gain switch allows for proper gain settings, whether or not a subwoofer is part of the system.


Compact size lets the KTP-445A fit where most amplifiers won’t. The KTP-445A comes equipped with direct plug-in connectors for select 2005 and newer Alpine head units and it fits behind the dash of most vehicles. It’s small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. Its size and flexible wires make the Power Pack an easy choice to save space.

Best Signal-to-Noise Contender In Its Class

In order to ensure that Alpine sound quality is heard, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Total Harmonic Distortion (THD+N) vs. Frequency

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. – less than 0.03% THD+N @ 1W, 1% THD+N @ rated power.

Model KTP-445A
Model: KTP-445A
Product: Alpine KTP-445A 4-Channel Head Unit Power Pack Amplifier
Weight 1.2 kg

RMS Power Output (Watts x Channels) 45 x 4
Peak Power Output (Watts x Channels) 90 x 4
Minimum Impedance Unbridged 2
Minimum Impedance 2
Best Frequency Response 20-20k Hz
THD at Rated RMS Power 1%
Signal to Noise Ratio 84 dB
Input Voltage 14.4v


Amplifier Class D
Bass Boost No
Fan Cooled No
Fuse Rating 15
Speaker Level Inputs Yes
Preamp Outputs No
Width (inches) 7-7/8
Height (inches) 1-1/2
Depth (inches) 2-9/16

What's in the box

Alpine KTP-445A Power Pack owner's manual
Head Unit Power Pack (15A fuse installed)
39" Amp-to-receiver harness (male 16-pin connector on each end)
31" Amp-to-vehicle harness (male 16-pin connector on one end and a female 16-pin connector on other end)
2 Brackets
4 Screws
4 Wire-ties
Installation Diagram
Online Product Registration
Limited Warranty Information

Mobile Amplifier Channels

4 Channel

Mobile Amplifier Class

Class D

Mobile Amplifier Features

Speaker Level Inputs

Mobile Amplifier Fuse Rating


Mobile Amplifier RMS

151 to 200 watts

Mobile Min Impedance


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Alpine Canada 1 Year Limited Manufacturers Warranty


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