How to install the Alpine KTP-445 Power Pack
Upgrade your car stereo with this compact, powerful amplifier
This video demonstrates how easy it is to install the Alpine KTP-445 Power Pack amplifier module. The Power Pack bumps up the power output of your Alpine stereo to 45-watts RMS per channel, giving your music increased clarity and detail. You get the power and improved sound of an external amplifier at a fraction of the cost and with a much easier installation.
Note: Since this video article first appeared, Alpine replaced the KPT-445 model with the KTP-445A, which works the same way as the KTP-445.
Read video transcript
In this short Crutchfield video we're borrowing a coworker's Jeep to show you how easy it is to install the Alpine KTP-445 Power Pack. The Power Pack is an add-on, 45-watts per channel amplifier module that works with Alpine stereos.
Installing the Power Pack is really simple. It connects between the stereo and the original Alpine wiring harness. First you'll have to remove your stereo from the dash. Carefully pull off the trim ring as we've done here and use the removal tools that came with your stereo to release the locking clips on the sides. Then pull out the stereo and carefully unplug the wires and set it aside.
Next find a place to mount the Power Pack behind your dash. Alpine made the wires long enough to reach the stereo from just about anywhere in the dash. In our case, we were easily able to stick the Power Pack right behind the Jeep's glove box.
Now it's time to hook it up. Plug one end of the Power Pack's wires into the harness that's already connected to your cars wiring, then grab the stereo and plug the other connector from the Power Pack into the back of it. One nice thing is that the plugs only fit one way and that makes it easy to get right.
Now carefully re-install your stereo and guess what? You've more than doubled the power in your Alpine stereo without the extra work of installing an outboard amp and that extra power will bring out musical details you weren't hearing before. You can learn more about the Alpine Power Pack at crutchfield.com/KTP445 or give us a call at 1-800-555-9408.
Comments (20)
Please share your thoughts below.
Doug Rose from Tampa
Posted on 6/13/2022
I have a 2014 JKU with the factory alpine system. Will there be any issues with the factory amp with the KTP445a?
Buck Pomerantz from Crutchfield
on 6/15/2022
Michael Roy from Ottawa
Posted on 3/25/2021
Is there some kind of harness to make this job easier? I'm looking to install the Alpine KTP-445U with my factory head. unit in a 2017 Jeep Wrangler
Buck Pomerantz from Crutchfield
on 3/31/2021
Kevin Gabriel from Kapolei
Posted on 6/24/2020
Im assuming the install is exactly the same with an Alpine KTA-450 amplifier? It will be mounted to an Alpine ILX-w650. If I have aftermarket door speakers, is it still plug and play?
Buck Pomerantz from Crutchfield
on 6/25/2020
Evan Tuttle from Moore, Ok
Posted on 4/9/2020
Ok my original car radio doesn't connect to a 15a fuse in the fuse block. So I have to connect the KTP-445A directly to the battery. Do I connect the neg side to the OEM adapter and the yellow (batt) side to the battery or do I have to use a different ground for the KTP-445A amp. And connect the yellow to battery.
Buck Pomerantz from Crutchfield
on 4/9/2020
Ken from Elmhurst
Posted on 1/2/2019
I had a KTP-445U installed in my 2018 Camry SE with standard factory audio system (non-JBL). I'm now having a Bluetooth Audio Echo problem where the caller hears their own voice echoing back to them when calling my phone which is connected via Bluetooth to my car. Do you have any suggestions as to what might not be installed or adjusted properly that would cause this problem?
Buck Pomerantz from Crutchfield
on 1/7/2019
Steve Swenson from Chaska, MN
Posted on 8/4/2018
Hi, I want to install component speakers instead of factory in the front door and by the windshield i have a 1997 camry and the speakers are Jl audio C3-650s. The wiring is good for those speakers?
Buck Pomerantz from Crutchfield
Posted on 12/11/2017
Chris, The Alpine KTP-445/A comes with wiring harnesses that have plugs on each end - there aren't supposed to be any loose wires. Maybe you're asking about a different amp's wiring harness. If you bought your amp from Crutchfield, you could call Tech Support for free help troubleshooting your system. Their toll-free number is on your invoice. If you purchased your equipment elsewhere, you can still get expert Crutchfield Tech Support - 90 days-worth for only $30. Click on this link for details.
Chris from Riverside ca
Posted on 12/9/2017
What is the yellow wire with the blue stripe? All other wires match, and that one is left!?!?
Buck Pomerantz from Crutchfield
Posted on 10/9/2017
Joseph, The Alpine KTP-45U has speaker-level inputs, so there's no need for an external line output converter.
Joseph Lanzi from Freehold
Posted on 10/8/2017
When installing with my original head unit do I still need to add a Line output converter or is it already built in to my alpine ktp445u