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  • Specifications
    Continuous Watts x Channel @ Ohms
    45W x 4 x 2
    Maximum Watts x Channel @ Ohms
    45W x 4 x 4
    Amplifier Class
    D
    Number Of Channels
    4
    Bass Boost
    None
    Bridgeable
    Yes
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Alpine - Power Pack 180W Class D Bridgeable Multichannel Amplifier with High-Pass Filter - Black

Model:KTP-445U
SKU:4769803
Your price for this item is $289.99
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This Product
 
Continuous Watts x Channel @ Ohms
45W x 4 x 2
60W x4 @ 4 ohms
200x1 @ 2 ohms
Data Not Available--
Maximum Watts x Channel @ Ohms
45W x 4 x 4
90 watts RMS x4 @ 2 ohms
Data Not Available--
50 Watts x 4 @ 4 Ohm
Amplifier Class
D
D
D
Not Applicable

Reviews

Rating 4.7 out of 5 stars with 765 reviews

Rating by feature

  • Rating 4.6 out of 5 stars

  • Rating 4.7 out of 5 stars

  • Rating 4.7 out of 5 stars

96%would recommend to a friend

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The vast majority of our reviews come from verified purchases. Reviews from customers may include My Best Buy members, employees, and Tech Insider Network members (as tagged). Select reviewers may receive discounted products, promotional considerations or entries into drawings for honest, helpful reviews.

  • Rated 5 out of 5 stars

    I Highly recommend the 445u

    This amp was my first car audio purchase since college…. Tech has caused things to shrink, yet still be efficient- this amp is an example of that. Before I begin - let me say I like a clean factory look…. I try to keep things factory but the sound was terrible. It is in my 2010 FJ Cruiser…. Pushing new component 6x9 speakers …. From a pioneer wireless CarPlay headunit. It makes a world of difference - 4x40 rms for sure - just enough to be loud and clear…. I haven’t pushed the speakers yet as I don’t blast things- but music is so much more different with an amp. You’re missing details in your music if you’ve only ever used a stock stereo- yes even jbl. If you like that factory look- this will work with your factory radio- an extremely easy install as well …. This amp takes up very little space but does its job very well. Super easy install as it can run off the headunit within certain parameters…. Just get it.

    Posted by JRock

  • Rated 5 out of 5 stars

    regalo a mi 72 chevy

    Alpine with excellent quality of very practical audio and its small size very easy for installation. buy 2 and I am very satisfied by suc

    Posted by JaimeC

  • Rated 4 out of 5 stars

    Great Little Amp!

    Great little amp. Got it for my '78 F150 to run door speakers & 6x9s behind seat. Loud, clear sound. Nice compact size. I have it temporarily mounted with zip ties in the pics. (The actual mounting brackets are missing but that is Best Buy's fault) Plan to remount it more securely later. Only reason I didn't give it 5 stars is the location of the adjustments, gain, etc.

    Posted by Installed

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