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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

115 people say
Our Price: CAD $219.99

In Stock
Product Code: 500KTP445U

Overview Details Accessories
Alpine Authorized Online Dealer

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

115 people say

Good way to go when you don't have $$$$ March-23-15
Reviewer: JT from Georgia  
A solid piece of equipment to give you the small boost necessary to make your factory stereo sound less anemic.

The first and the best March-10-15
Reviewer: Isaac from Wisconsin  
The first mini-amp that was worth a darn, in my opinion. This little fella has been used on many installs where we weren't looking for full 4ch amp power. At 45wrms it's a touch overrated, based on the old meter, but it really breathes life into some starving speakers vs 20wrms or so that headunits put out. With the ability to be bridged to a 2ch @ 4O output, too, it's very versatile (keeping a honda factory sub working, ya dig!). Most recently I used it to spank on some 120wrms Morel Tempo Ultras, and it got them moving well. Can't recommend this thing enough. The only, only downfall is that it's not waterproof, so if it goes in a Harley fairing don't blast it with water.

Great amp January-07-15
Reviewer: WRX owner from Nevada  
This amp fit in the dash of my 2004 WRX behind the glove box.  Using some weatherstrip foam and zip ties it attaches to a horizontal tube found in the dash of Subaru's.  The weatherstrip went between the metal tube and amp it cushions the amp from vibration and helped hold it in place.  I find that I often use most of the power this amp provides.  In hindsight, I would have bought more efficient speakers in the front doors.

Great things to come December-28-14
Reviewer: super soobie fxt from ny  
I'm doing a tablet install on 2012 forester xt touring and this little gem will be my speaker driver. Looks well built and the wiring harnesses are really plug and play .... I bought the Metra wiring kit and like how the radio power can power this up ... Go me.

Nice Little Unit but Short on Help December-14-14
Reviewer: SYates from Orlando, FL  
I bought a 2014 Accord Sport with the understanding it had a basic head unit and low end speakers. I started by upgrading to some Blaupunkt Blue Magic speakers but the head unit is so bad, it could not push any sound through the speakers so I did some research and landed on this little unit.  

I will say I had some trouble with the settings. For some reason, I have to turn the gain completely off because otherwise it will cause the amp to kind surge through the speakers and the whole car vibrates. It took me some time to figure that out and is really the only reason I dropped a star on it. I am no stereo expert but I am no novice either so I was surprised at how little information there was available to help me troubleshoot. Thankfully the staff at Crutchfield was patient with my questions.  

The speakers sound great and it still gets plenty loud. I will not win any car stereo competitions, but it is so much better than the factory stereo and I am enjoying my music one again!

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Alpine KTP-445U Power Pack CAD $219.99