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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

137 people say
Our Price: CAD $219.99

In Stock
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.

   » 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

137 people say

Reviewer: Anonymous person from New Franklin, ohio  
Nice unit, made a big difference

Great solution November-18-15
Reviewer: Pmen from Outer Banks, NC  
Part of a three sided attack (door speakers, Subwoofer, amp) to improve upon the crappy Ford / Sony non DSP 700W setup in a late model F150 Screw.  The input leads as pointed out many times, are very short.  Since I wired them to the speaker line of the Sony amp under the center console, it wasn't that big a deal.  Set the amp up as a 4 channel.  The amp delivers very clean sound through aftermarket JBL coax's in the rear doors and Focal components in the front.  One small complaint is that the Kicker soundstage subwoofer replacement under the back seat will not come on until the volume is up beyond 1/3 which is kind of loud for some.  It would be nice if everything worked together, but that's another story.  Not much help from Tech support.  All in all, very compact and fits well under the center console.  Delivers clean, much improved sound, in place of the crummy Sony amp.

Clean sound, substantial improvement November-09-15
Reviewer: Karen from Tennessee  
I originally tried the Clarion XC1410 with the factory head unit in my Tacoma (with all new speakers), but had some issues with functionality and sound quality.  The unit was professionally installed here locally.  We swapped it out for this Alpine unit, and the improvement in sound quality was substantial.  The Alpine produces a much cleaner sound, with good dynamic range and a better sound stage.  The Alpine unit has a gain control and crossover, and the S/N ratio is higher, resulting in less high frequency noise.  This unit, combined with new Focal and JL Audio speakers, produces excellent sound quality.

Reviewer: Anonymous person from Pennsylvania  
excellent speaker for the price

Great little amp for any application September-20-15
Reviewer: Chris G from Illinois  
I have used 1 of these amps in 2 different vehicles and it has been great in both! I installed one in a 2002 Jeep Wrangler with a Kenwood head unit, along with Alpine Type S speakers.  It was a great boost in power to the speakers.  I also upgraded the factory sub to a small Kicker 6 3/4" sub and powered with an MTX amp.  High pass frequency settings on the KTP-445 work wonders!  I also just recently used another KTP-445 in my 2016 Subaru Legacy and installed Focal components.  Amazing difference! Speakers were installed first and the factory head unit was obviously not enough to give the speakers what they want.  Installed the KTP-445 shortly after (within 4 days) and I am beyond pleased!

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Alpine KTP-445U Power Pack CAD $219.99