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Alpine KTP 4-Channel 45-Watt Car Amplifier (KTP-445U)

  • Model #: KTP-445U
  • Web Code: 10195707
(2 ratings)


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 unit's built-in amplifier.

More Information

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 easy 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.
  • Universal Application RCA or High Level in.
  • Efficient digital technology keeps the power pack cool.
  • Small and compact, fits easily inside the dash for a clean install.
  • Upgrade your sound system around the power pack.
  • Trickle down technology from PDX amplifiers packs big power in a small space.
  • 40% power increase compared to built-in head unit power.
  • Increases output to 45watts RMS x 4 for tighter bass, and clearer highs.

Manufacturer's Warranty:

  • Parts - 1 Year(s)
  • Labour - 1 Year(s)



Customer Reviews

3.5 / 5
Based on 2 ratings,2 Reviews
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  • from Campbell River, BC
  • Apr 03, 2015

Easy to install and sounds great but didn't last

I had this Alpine power pack wired to my Alpine in dash dvd/nav. Powering four alpine type r components. Sounded awesome for about fifteen months but then the front passenger side channel started cutting in and out under heavy load. At first I thought bad connection but after further investigation the short was inside the power pack. This product did work well and was really easy to install I just wish it lasted a little longer. I do drive long hauls 10 + hours at a time and listen to my music fairly loud. I assume I overworked the little guy and melted something. Save yourself the future hassle and install a four channel external speaker amp from the start.

  • from Port Hope Ontario
  • Feb 25, 2015

Excellent small amp

This amp is tiny, and packs great power to make door speakers work great. The amp can be mounted almost anywhere, has crossovers for all 4 channels, and is remarkably clean sounding for a pure class D amp. It is a bit pricey, and is not suitable for sub-woofers, but works very well for coax or component speakers and is way better sounding, more powerful than any deck out there. If size matters, this is a great buy.