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Customer Ratings & Reviews

Your price for this item is $199.99

Customer reviews

Rating 4.7 out of 5 stars with 61 reviews

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  • Value

    Rating 4.5 out of 5 stars

  • Quality

    Rating 4.7 out of 5 stars

  • Ease of Use

    Rating 4.4 out of 5 stars

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98%would recommend to a friend

Customers are saying

Customers are impressed with the Key Smart 180W Class D Multichannel Amplifier's sound quality, saying it significantly enhances the performance of factory speakers. They also appreciate its compact size, noting that it is easy to hide and wire up. Installation is considered simple and straightforward.

This summary was generated by AI based on customer reviews.

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.
Page 1 Showing 1-20 of 61 reviews
  • Pros mentioned:
    Power, Size, Sound quality

    Rated 5 out of 5 stars

    Powerful and Smart door speaker amp

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    Posted . Owned for 4 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This tiny but powerful unit tunes itself using a microphone (similar concept to a Sonos) and gives your standard door speakers a lot more power. It was small enough to fit behind the dash on most cars and really makes a difference in quality. Highly recommend along with GS professional installation.

    I would recommend this to a friend
  • Pros mentioned:
    Power, Size, Sound quality

    Rated 5 out of 5 stars

    Awesome Amp for the Tacoma!

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I installed this in my 2016 Toyota Tacoma and all I can say is wow! The stock head unit doesn’t have enough power for upgraded speakers so I picked this up and it’s more than enough. The built in sound processing sets up your front stage pretty well. The amp is small enough to mount behind the radio! Highly recommended!

    I would recommend this to a friend
  • Pros mentioned:
    Size, Sound quality

    Rated 5 out of 5 stars

    Love it

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I had a whole new stereo system installed in my FRS. The salesman turned me on to this amp, it tunes itself. You dont need a new stereo head for this it was meant to make your factory head unit sound much better. I was very impressed with this little amp. It was so small they put it behind the head unit.

    I would recommend this to a friend
  • Pros mentioned:
    Power, Sound quality

    Rated 5 out of 5 stars

    Excellent option for a OEM factory radio

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    Posted . Owned for 2 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I had this little amp installed behind the factory radio in my 2017 Honda Civic EX Sedan. I was amazed by the improved sound quality. It's more then enough power for two sets of Kicker CS Series Component speakers I have installed in front and in back that replaced two sets of factory component speakers. The Best Buy installer did an amazing job on the installments in my Civic. The installer went over everything with me on the amp before and after it was installed.

    I would recommend this to a friend
  • Pros mentioned:
    Power

    Rated 5 out of 5 stars

    Integrates well with stock head unit

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    As someone whose last 300/4 amplifier was around 18”x12” in size, I was skeptical that this unit would produce sufficient power to my four truck door speakers. It is not going to win any audio competitions, but that is not what I expected in purchasing this amp. I purchased it to 1) be installed out of sight, 2) integrate easily with a stock head unit and 3) provide extra power that the stock head unit is not capable of to aftermarket speakers. It checked all of those boxes, so I say it is worthwhile for those that are looking for the same.

    I would recommend this to a friend
  • Pros mentioned:
    Size, Sound quality

    Rated 5 out of 5 stars

    Good compact amp

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Installed the amp w kicker 6.5's and what a difference it makes! Plays loud and clean for such a small and compact amp. Good feature with the tuning mic for calibration. I would recommend this amp if you want to stay under $200 and have a reliable, great sounding amp that is super compact.

    I would recommend this to a friend
  • Pros mentioned:
    Size, Sound quality

    Rated 5 out of 5 stars

    Excellent Kicker Amp

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    The amp makes the music sound incredible. The amp is paired with a pioneer AVH deck and four 6 x 9 thee way 2 ohm JBL speakers. The deck has a 13 band graphic equalizer which really makes a huge difference in how music can be adjusted. This amp uses a calibration system to optimize the acoustics in my car. I would definitely recommend this amp.

    I would recommend this to a friend
  • Pros mentioned:
    Sound quality

    Rated 5 out of 5 stars

    Great amp for the price.

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Bought this amp/processor at a very good price and sounds better than the $500 - $700 amp/processors. Had the Tec install amp/processor and hooked up to my new speakers. He then called Kicker and they setup the sound for the processor. Great sounding setup.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use, Sound quality

    Rated 5 out of 5 stars

    Great sound, affordable and small footprint

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    Posted . Owned for 10 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    WOW! Great things come in small packages. Phenomenal sound from this small amplifier that is easy to setup and use. It takes care of itself. Fits in small spaces and is crystal clear!

    I would recommend this to a friend
  • Pros mentioned:
    Sound quality

    Rated 4 out of 5 stars

    Some great, some not so great things

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    In my application this app fits well and the sound is very clean, But I bought this app because it has the ability to use an included mic to set the sound stage. However my Best Buy installer didn't use that function so it was helpful. It a simple install this can be a winner. In a more complicated install a true DSP is a better choice.

    I would recommend this to a friend
  • Pros mentioned:
    Sound quality

    Rated 5 out of 5 stars

    Great amplifier for a little power

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    If you aren't trying to blow your ear drums out and have better sound quality and more volume, than this amp is perfect for powering a couple of smaller speakers.

    I would recommend this to a friend
  • Pros mentioned:
    Sound quality

    Rated 5 out of 5 stars

    Perfect for when you want a bit more.

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    Posted . Owned for 6 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I wanted to install an amp in my car for my speakers since I had already done my head unit and subwoofer and this was the best choice for me. I like the auto eq that it does with the microphone because it adjusts the timing of each speaker and through some crazy magic it makes it sound like the music is coming from the front of my windshield. I went from getting clipping in my speakers when the volume was at 28 to getting no clipping or distortion at max volume; 35. Really nice for getting that extra bit of power since the head unit puts out about 25watts rms and this puts out about 45watts rms per channel. Really nice sound.

    I would recommend this to a friend
  • Pros mentioned:
    Power, Sound quality

    Rated 5 out of 5 stars

    Awesome!

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    Posted . Owned for 2 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    great little amp with alot of power and sounds great. I have installed it in three different vehicles with factory stereos and i cant believe what a difference it makes.

    I would recommend this to a friend
  • Pros mentioned:
    Ease of use, Sound quality

    Rated 5 out of 5 stars

    Night and day difference

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    Posted . Owned for 3 months when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Very easy install and setup. After the self tune, you can definitely hear a difference. Much fuller sound, and speakers can finally stand up to my subwoofer.

    I would recommend this to a friend
  • Pros mentioned:
    Size, Sound quality

    Rated 4 out of 5 stars

    Just Installed in QX60

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    Posted . Owned for less than 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Small enough to fit next to radio. Definitely better than the non Bose radio in my car but I think I may try running the Auto Eq setup again. I was expecting a little more sound quality out of it but it could be the speakers I chose.

    I would recommend this to a friend
  • Pros mentioned:
    Power, Size

    Rated 5 out of 5 stars

    Packs a punch

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    Posted . Owned for 1 week when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Plenty of power for the size. Fit great and did not take up a lot of space versus some other amps.

    I would recommend this to a friend
  • Pros mentioned:
    Power

    Rated 5 out of 5 stars

    Nice and compact

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This little amp packs a pretty good punch without breaking the bank.

    I would recommend this to a friend
  • Pros mentioned:
    Sound quality

    Rated 5 out of 5 stars

    Nice compact amplifier

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    Posted . Owned for 3 weeks when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    I had a base system in my Jeep cherokee that Just did not sound right. After replacing my speakers with upgraded ones the stock stereo wouldn’t drive them And I was turning the volume up too high causing distortion. After reading amp reviews I decided on this amp that basically provides four channel amplified sound And processor in one Worked great

    I would recommend this to a friend
  • Pros mentioned:
    Size, Sound quality

    Rated 5 out of 5 stars

    Massive power and so so small!

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    Posted . Owned for 1 month when reviewed.
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    Put in my 06 Pontiac Solstice and it rocks! Great sound, so small and solid!

    I would recommend this to a friend
  • Rated 5 out of 5 stars

    Best amp for mids and highs

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    Posted .
    This reviewer received promo considerations or sweepstakes entry for writing a review.

    This amp is AWESOME. I bought new door speakers for my 2017 Tacoma. Kicker DS series 6x9s in front doors and 6 1/2 in the rear. They didn't sound as good as I hoped and was told I needed a sound processor for my factory head unit. Auto installer at bestbuy recommend this and I'm glad he did! It now sounds like I have at least a 10" woofer in my truck and it made it soooooo much louder. I can't even turn it 3/4 of the way up now compared to before when it was all the way up and it wasn't loud enough. Best 200 bucks I've ever spent on car audio products.

    I would recommend this to a friend