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  Alpine KTP-445U Head Unit Power Pack 45W x 4 Car A
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Compact upgrade for any car radio — 45 watts RMS X 4

153 people say
Our Price: CAD $239.99

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Product Code: 500KTP445U

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More power, less hassle

Want a simple way to crank up the power of your receiver? Alpine's "Power Pack" amplifier increases your receiver's power output to 45 watts RMS by 4 channels. That's a big jump up from the 7-20 watts per channel typically put out by a car radio, and plenty of power to drive high-performance speakers or keep up with a big subwoofer amplifier. Best of all, this compact amplifier is so efficient you can often run it off the same circuit that powers your receiver. A universal plug lets you feed a signal via RCA outputs or speaker-level wiring.

You can install this compact amp behind most dashboards, but you'll need 4-channel patch cables to connect your car stereo to the amp's preamp inputs. You can also splice into your speaker wiring to get signal to the KTP-445U.

Installation Note: We recommend running a dedicated constant power wire to the battery for optimal performance from this Alpine amp — we offer an inexpensive wiring kit for this installation. This high-powered amp won't work in systems where an outboard factory amplifier is still active.

Product Highlights:
   » compact Class D amplifier for factory and aftermarket receivers
   » universal plug lets you send signal from RCA outputs or speaker-level wiring
   » 4-channel amplifier
   » 45 watts RMS x 4 at 4 ohms (CEA-2006 compliant)
   » built-in high-pass crossover (selectable 60, 80, 120 Hz at 12 dB/octave)
   » selectable gain switch (high/low) and switchable 2- or 4-channel operation
   » fuse: 15A
   » dimensions: 7-7/8"W x 1-1/2"H x 2-9/16"D
   » warranty: 1 year

Alpine KTP-445U Power Pack Reviews

153 people say

It has its pros in cons in my opinion. May-13-16
Reviewer: audiophile from Grand Rapids, MI  
This is definitely an improvement to a stock head unit. It sure does pack a punch after tapping into the stock head unit power and ground, as described in the manual. Some maybe skeptical that splicing into the head unit power will be sufficient for an amplifier but I think it supplies plenty of power.

I replaced the stock speakers with JL audio C2 series and had the gain on this amplifier at nearly 20-25% and it was quite loud.

Great amp for tight spots! May-08-16
Reviewer: Thomas from NJ  
I was replacing y 2002 WJ Grand Cherokee's Infinity radio, which meant I could not use the factory amp anymore.  I was going to run the speakers off the Kenwood head unit- then I found this Universal Power-pack online.  I patched it into the factory amp's wiring harness under the back seat, even re-used the factory power/ground wires.  I ran two sets of 11.5 foot RCA cables for my signal from the Kenwood to the amp because I wanted a nice clean signal.  I already had full range 6.5 speakers in the front doors (was not using the old stock dash speakers anymore).  WOW it blows away the original amp, nice clear sound with enough bass to shake my seat (jazz/blues/rock) from the four 6.5's in the doors.  I can't believe I didn't have to sacrifice cargo space or run huge wiring for it!  Nobody even knows it's there- perfect!

Excellent value and quality May-07-16
Reviewer: Mjm from Honolulu, HI  
I researched small amplifiers for my jeep. I just wanted little more power to my aftermarket speakers. This is the amp if you want a boost to your factory or aftermarket radio.

Works great!! helps a weak aftermarket deck with s May-04-16
Reviewer: P Brokaw from Tacoma, WA  
Installed in 2006 Wrangler. Put amp underneath steering column dash panel. Fits like a glove. Deck is a marine grade Sony media center and speakers a Rockford Fosgate 5 1/4s front and rear.

juck May-01-16
Reviewer: Matthew from Schuylerville, NY  
alpine has gone down hill this amp is a pain 2 install gets really hot idk what  happen with alpine but thay are junk now

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Alpine KTP-445U Power Pack CAD $239.99