Got this amp to power Polk DB651, and DB6501. Sounds are crisp, and clear. Absolutely no signs of over heating. Amp is still cool to the touch after an hour of solid play. Set up took about 20 min and I haven't touched it since. Great little amp!

This amp is one of the SMALLEST 4 channel amps i have ever seen...Not only the size but this is one of the most powerful in its size...this is my third amplifier on the setup i have in my car, Infinity Kappa front and rear and this little amp really kicks all the other out the window! I will buy another one for my other car, its that good....Most amazing 4 channel amplifier ive ever heard this size. To all other reviews that say it gets "SO HOT" or whatever, it says in the manual if it is not installed correctly it will over heat and it also states during normal operations may cause burns. so it is normal AND it DOES have twin fans. The only amp in its class that ive owned that does not shut down at too loud of a volume for long periods of use. These other reviews are very vague and do not give this amplifier enough credit and are only acceptable if they are comparing this to a 500$ Kappa amp which i doubt they have as they just bought one at 1/5th the price so if you ask me i would say they are amateurs that dont know how to tune an amp in correctly because trust me this one is worth every cent. I would buy 5 just for future cars if i could. 100% quality...kenwood out did their selves and sold me to all of their other products with just this amplifier! A sony xplod amplifier deserves the ratings from the others on here as this one deserves a perfect 5. (upgraded from an xplod 600w to this and yeah its that big a difference... this will NOT shut down crank it all the way up!

Item was easy to install and adjust with great sound.

I recently added this amp to my car and what a difference it makes. I have had my deck amped before but I do not remember it having the clarity this amp provides. Like all upgrades, I started with Kenwood Speakers. I can max out the volume and I still have clean and clear tunes. I had the volume all the way up and for the fun of it I honked my horn, and could barely hear it. I luv this amp. I'm saving up for a sub next. Looking forward to completing my upgrade.

I bought this amp about 5 months ago as part of a stock equipment upgrade for my Hyundai Sonata
It's worked flawlessly since. It's compact size fits under my passenger seat. I used the included speaker level inputs to hook into the stock stereo which was fairly easy with the included directions, but very time consuming.
I listen at high volumes quite often and this amp takes it easily. I have it hooked to Boston Acoustic components in the front and 2-ways in the rear. It's crystal clear. It also offers a lot of flexibility for tweaking your sound with the crossovers built in.
I've owned several Kenwood products over the years and have never had a problem.
I highly recommend this amp.

It gave me the boost I needed to hear my music above any wind noise with my windows and sunroof open in my HHR. Installation was very easy and 'tuning' it was easier yet. I liked the fact it has a cooling fan when so many amps in this price/power range rely solely on heat sinks. Its operation is seamless when it is powering on or off via the automatic sensing circuitry, no popping. HIGHLY RECOMMEND!

This Kenwood amp rocks! Have had Alpine and Jensen amps and they always would overheat and cutout at higher volumes. This Kenwood just keeps jamming. Powering 2 Polk components and 2 coaxial Polks with Kenwood HD receiver, running through Kicker 4g wires and 12g speaker wires.

When I first bought the amp wasn't sure if it was going to get the job done. Boy was I wrong! I've had nothing but great things to say about the amp. They make my highs and mids sound loud and clear without the 1st sign of overheating. I would recommend this product for anyone that wants big beautiful sound for a small price. Thanks Sonic Electronix for this great amp at a great price!

I was looking to replace my amp that burned up after 10 years of use. It was a Kenwood also. I had great use out of it and wanted to find something close. This Kenwood KAC-8405 was the answer. It was easy to hook up and sounds just like my old one. The price was right and I'm very pleased with it.

I have one of these amps in my truck and another in my car and they are fantastic. Very powerful and reliable. You just can't beat it for the money

Amazing amp! Highly recommended. Works PERFECTLY and sounds great. Much smaller than I anticipated escpecially for a 4 channel amp, but dont let it fool you, this thing packs a ton of power, and looks awesome too! Definitely buy it!

I have had this amp in for 2 years. I have floated down the river with it, taken it to BBQ cook-offs in the closed ice chest in 110 degree heat, and banged it around all with no problems. It has plenty of power to push by Polk 6x9's and I have the other two channels bridged to a soundstream 10" sub. I am buying this amp again for a friend who wants an ice chest radio too.

This is the best amp possible if your running kenwood system, everything is clear and crisp and i can max volume and still hear everything clear with no distortion.

This amp's price was right and had lots of spunk.

I bridged it for two Alpine subwoofers in my fleetwood and had no problem with this amp.

I got this amp from Amazon. The power hook ups seem fairly small but I guess the sound is what's important. This thing works VERY WELL WELL. I RECOMMEND IT! MAKE SURE YOU HAVE SPADE CONNECTORS THOUGH!!

I have no issues with this amp. Was decently priced and cleared up the limitations of my head unit. I installed it under my seat and I have no issue with it over heating even after hours of playing at a high volume.

I would buy recommend this amp to friends that needed a small boost over their head units. Not many bells and whistles but that's the way I prefer since I would rather my other components handle the crossover.

I did like the line inputs so it could be installed without an aftermarket head unit.

I would recommend this amp if you want a reliable amp for a moderate sound system. I definitely love the looks of it, and why don't all amplifiers have fans on them? I ran mine with 4 gauge wire, even though I believe they only recommend 8 gauge, plus it gives me a little room for future upgrades. I installed this in my 2001 Jetta, under the rear deck so it has plenty of air circulation, and easy to get to for tweaking.

First of all this amp is well worth the money. I know kenwood is not known for their amps, but this is the second kenwood amp i have purchased and so far i like them. Don't get me wrong... these are great for the money! The settings are easy to work with and the amp comes with fans! i live in Las vegas and it gets HOT! the fans have kicked in but the amp has never gone into protect mode and im only powering some alpine type R's, makes them loud with out hurting the ears.

Why wouldn't you buy this amp to power your speakers? Makes my alpines sound so clear its not even funny.

I bought this amp to replace an X Thunder amp. I wish I would've bought this one in the first place! The highs are crisper and cleaner, and with the fans, I've never had it shut down. I would'nt hesitate to buy another one!

powerful 4 channel amp. easy install. great hookups. and works like its supposed to . a++

Owned one and loved it. Sold to a friend & he loves it. Have put one in wife's car and another friend. All are happy and made there 6.5 comp & coaxials scream.

Pro: Easy to install. Easy to set up and make sound good. Fan is also great. It never gets warm. Will install under just about any seat. Have run CDT cox-622 which take 90w rms and made them rock!!!
Con; Have not been able to find one.

for the price this amp is great, good sound quality and output, dont like the position of the controls for gain, hpf/lpf etc, the way its set up in my car you have to unscrew the amp to adjust them unless you do it blind

Before I was told about this Kenwood amp in person I was gonna decide between a JL Audio, MB Quart, Hifonics or an Alpine amp. I then compared it to others within it's class and this one was more convincing and less money!! I have it hooked up to my 5.25" Focal component system and it sounds great! 60 watts RMS @ 4ohms sounds like a little, but is more than enough clean power needed for those highs and the chicks everywhere on the streets always turn around and dance to my music!!