About the Alpine KTP-445A Power Pack
![Buck Pomerantz](http://images.crutchfieldonline.com/ImageBank/v20210105085000/core/people/writers/BuckP.png)
![Alpine Authorized Online Dealer](http://images.crutchfieldonline.com/ImageBank/v20160429120000/graphics/Logos/alpine.gif)
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.
Product highlights:
- compact Class D amplifier for Alpine in-dash receivers
- 4-channel amplifier
- 45 watts RMS x 4 at 2 to 4 ohms (CEA-2006 compliant)
- fuse: 15A
- dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
- warranty: 1 year
- MFR # KTP-445A
What's in the box:
Alpine KTP-445A Power Pack owner's manual
- Head Unit Power Pack
- 15-amp ATM 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
Customer reviews for Alpine KTP-445A Power Pack
Loading...
Loading reviews...
Average review:
5.0 out of 5 starsThanks for submitting your review
Customer photos
This review was collected as part of a promotion
Pros:
Cons:
More details on the Alpine KTP-445A Power Pack
![Mark G.](http://images.crutchfieldonline.com/ImageBank/v20180913135400/core/people/research/mark.png)
Features & specs
Performance | ||
---|---|---|
RMS Power Output (Watts x Channels) |
45 x 4 | |
Peak Power Output (Watts x Channels) | 90 x 4 | |
Power at 2 Ohms (Watts x Channels) | N/A | |
Power at 1 Ohm (Watts x Channels) | --- | |
Bridged Power (Watts x Channels) | N/A | |
Minimum Impedance Bridged | N/A | |
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 | |
Features | ||
Amplifier Class | D | |
Low-Pass Crossover Frequency | N/A | |
Low-Pass Slope (dB/octave) | N/A | |
High-Pass Crossover Frequency | N/A | |
High-Pass Slope (dB/octave) | N/A | |
Bass Boost | No | |
Bass Boost Frequency | N/A | |
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 | |
Parts Warranty | 1 Year | |
Labor Warranty | 1 Year |
Product Research
Features
Alpine Head Unit Power Pack: The Alpine KTP-445A Head Unit Power Pack is an easy-to-install power upgrade amplifier that allows you to add higher output and more dynamic response to your Alpine head unit. The KTP-445A amplifies your Alpine head unit's power output, resulting in a 150% power increase over the original power from the head unit's built-in amplifier.
- If the fuse protecting the OEM radio is less than 15 Amps, you should run a separate +12V constant power wire from the battery to the higher-powered Alpine KTP-445A.
- The Alpine Power Pack amp will not work in systems where an outboard factory amplifier is still active. If used in vehicles with a factory amplifier, the factory amp will need to be completely bypassed (this may result in lost speaker channels, if factory amp has more than 4 channels).
- The increase in power may result in a louder warning chime in certain vehicles.
Compatibility: The KTP-445A connects to any 2005 and newer Alpine head unit that has a black 16-pin wiring harness. Please check with your Crutchfield Product Advisor to confirm compatibility.
45 Watt x 4 Channel Amplifier: The Alpine KTP-445A Head Unit Power Pack employs a 45 watt x 4 channel amplifier. The amplifier offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result is a 1 Watt Signal-to-Noise Ratio of 82dB or better. Uniquely, the amplifier distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion.
- CEA-2006 Power Rating: 45 watts x 4 channels (at 4/2-ohms, 20-20kHz, 1% THD)
- Max Power Output: 90 watts x 4 channels (Peak)
Note: The specifications given by Alpine for the built-in amplifier comply with the CEA-2006 mobile amplifier power testing and measurement standards from the CEA (Consumer Electronics Association). All manufacturers who comply with the standard can display the CEA-2006 logo on their product.
Installation: Since the KTP-445A is small and compact, it installs behind your Alpine head unit in the dash of most vehicles. Installation is simple with no special tuning. The 39" grey connector harness plugs into one end of the Head Unit Power Pack and connects to the rear plug on your Alpine head unit. The 31" black connector harness plugs into the other end of the Head Unit Power Pack and connects to your Alpine receiver's harness (included with your Alpine receiver). You will need to splice or crimp the wires from the Alpine receiver's harness to a Crutchfield vehicle harness adapter (sold separately).
The Alpine KTP-445A Power Pack replaces these items
![Alpine KTP-445 Power Pack](http://images.crutchfieldonline.com/ImageHandler/trim/450/245/products/20081/500/x500KTP445-f_mt.jpeg)
Alpine KTP-445 Power Pack
- 2-9/16"W x 1-1/2"H x 7-13/16"D
- compact plug-and-play amplifier for Alpine in-dash receivers
- 45 watts x 4 at 4 ohms
Loading...
Loading accessories...
Customer Q&A
85 questions already asked
Loading...
Loading articles...
Love it. Too easy to install. No amp wiring kit necessary. Crutchfield supplies the wiring harness and installation is a snap. Unit pushes four 5X7's in my Freestyle full bandwidth perfectly with no heat issues at all. Fits perfect with my Alpine head unit and the sound is very well balanced.
Chuck R. from Walnut Creek, CA