AK-55 Bluetooth 5.0 HiFi Stereo Digital Audio Amplifier Receiver for Home Speakers (4-16Ω) System 600W Dual Channel Power Sound Amp Receiver w/AUX, FM, MIC, USB Echo, Reverb Delay-US Plug

Purchased for Home surrounding system: solid case of metal (not plastic). Tested all functions except mic and worked as expected. Output power is enough for home use. Blue tooth connection is very reliable with 30-40 feet . Sound quality is acceptable ( depending on sound source). FM radio signals are little weak. USB/MP3 playback is good. Remote control well designed. Two shortcomings: 1 a loud sound comes out when switching functions and no way to make it quiet; 2 poor user manual and operation instructions.

I needed an affordable solution for my 2x 400w speakers and I found one here. It's compact, it's powerful enough to accommodate the speakers and yes, I did see that it has only Bass and Treble settings but man I'm missing the sub and echo!Pros:InexpensiveJust wat I neededPowerful/loudCons:Lacking sound controlsIf you're particular about how your music has to sound - don't buy this. Otherwise, decent bang for your buck.

Whether in your home or in your car, give this little amp 12 volts of power, a couple of speakers, and an input source, and you'll have awesome music. Don't let the size fool you - it's got good power and great functions. The Bluetooth, SD card/mp3, and line inputs are great. If you connect the FM antenna, the FM radio reception is decent. You'll likely have to try a couple of different arrangements of the antenna to get the best signal. It seems very well-built and would fit just about anywhere. I like the simple spring-loaded speaker connections - no special connectors are required! Again, great product for the money.

Needed something small that could drive my speakers at my office so I gave this system a shot as it was so inexpensive. Got it in, unboxed it, plugged it in, and hooked up my Micca Bookshelf Speakers.I was floored at the power of this little amp, the clean sound (no hums or ground loops), and the ease of use. It’s quite impressive. With the capability of screwing this in under my desk and running cables over the back, it keeps my desk clean and gives me solid sound.The functionality of the Line In is clear, the Bluetooth is easy to access and pair, and the radio has a decent pickup capability when the included antenna is plugged in. It’s a really great system for the price and the size is absolutely perfect!!! Can’t wait to try it with a couple of deep full range speakers later this week!!

Sounds pretty good. BT works great.It’s hooked up to tv in garage.Remote lasted a day so can’t scan for FM channel.

this thing is impressive. running 4 6.5" speakers in my RV, great quality and very very loud.ill never buy a car stereo again, ill just install this!

I've paired it up with a sound bar and a subwoofer and it actually sounds amazing. I've tried a few configurations of different speakers and they all sound nice. So far it's been easy to use.It's impossible that it's pushing the wattage they claim but it does produce nice sound. I also have a heck of a time figuring out how to find radio stations on the FM but I'll go through the instructions better.

I got the larger AK55 as an amp for my Bose acoustimass which uses about 250w maxed out. I liked the how this unit looked vs the smaller amp, and the karaoke portion adds an element of fun! The “echo” and “delay” knobs work together to control an overall reverb/delay effect, which is automatically blended at a nice volume in the background. This unit is perfectly at home in the garage and can easily handle a very powerful speaker system. No issues, Bluetooth works and sounds great, and great value for the money!