UWAYKEY Bluetooth Amplifier Board 2.1 Channel Class D AMP Module with Dual TPA3116D2 Chip

Assembled and connected the unit. No issues at all. Paired to my phone. Excellent volume and sound quality you’d expect from the speakers you use. I connected a small speaker to the SUB output to test it and it performed well for a small speaker. Don’t do this for long. It’s hard on the small speaker. Get a little unpowered sub. You’ll love it.Reading #2 in the instructions, you will see that if you use a 24volt power supply, you should NOT use 4 ohm speakers. It will overheat the chip and it will fail if you run it loud. This is typical of class D amps so don’t violate this limitation. Use 8 ohm or higher speakers if you use a 24 volt power supply.Edit: I started with a 24v supply but decided to try a 12v to see how it did. I’m using small speakers for my initial tests and they sounded noticeably better when using 12v. So try a 12v power supply first. That will also probably be much easier on the amp.Because it’s so tiny, it’s important that you do not fully cover the sides of the unit or place it in a box that doesn’t allow air to circulate into the unit and cool the heat sink. It may shut down on its own and recover after it cools off but if it does that, it’s telling you it needs more cooling air. It’s designed to just sit out in the open. Class D amps are very efficient but runners at the power level this one does, it still generates some heat and you have to allow it to escape.Overall it’s a keeper. Go to a charity-run thrift store and buy (2) of the biggest & best speakers you can get (and an unpowered sub) and you’ll have a very nice streaming setup. I’ll update if needed.

Todo es excelente!Ojo! Cuando conectas 24v solo da salida de 8ohms, si tus bocinas son de 4ohms, es mejor conectar a 12v con 5o 6 amperes para que la placa no se queme. Disfruten!!

I bought this in order to enable my experiments with DIY exciter-based speakers It worked better than expected and the price is perfect for experimentation.Best features:Easy to put together, little screwdriver is cute if a little redundantAfter a few drops on the floor I can testify that its tough enough for the careless among usBluetooth works wellSubwoofer out has frequency control that make is easy to adjust the overall sound. In fact I didn't have an extra sub to work with so I connected a center channel and adjusted the frequency to provide some semblance of bass and it worked pretty wellI can't testify to the quality of sound in comparison to my regular setup because I am not planning to connect my $2k speakers just to check that, but the little amp drives the exciters without problem and the sound seems decent. Because of the price I bought a couple more to make further experiments.On the minus side some nitpicks. The fit of the knobs is not super-elegant and the speaker terminals are a little cramped but to be honest I can't say that I care. I wish I have had this little amp 40 years ago when I was a lot poorer and was rigging some awful contraptions just to listen to some music.

This amplifier powers two Kenwood 5 1/2", 50 watt, 4 ohm, two-way stereo speakers, and a 6", 100 watt, 4 ohm subwoofer producing a rich, clean sound from whisper quiet to full volume with no distortion. I love how the volume and frequency range of the subwoofer can be controlled separately, so I can blend it in with my stereo speakers, or crank it to wall vibrating levels. I use the 1/8" line-in to connect the amp to my computer, but I can also switch on my phone's bluetooth and play from it without having to disconnect the line-in. I like the sound quality of my little, custom system better than my full-sized Kenwood system; and it is every bit as loud. The 6" subwoofer can't play the lowest tones of my techno-bass music, though that isn't a failing of the amplifier, but rather a limitation inherent in small speakers. I've hooked up one of the 12", three-way, Kenwood speakers to the subwoofer channel to try it out, but they are 8 ohm, 180 watt speakers, and too much for the little amplifier to fully power. Still, it is a great value for the money (a small fraction of the cost of the full Kenwood system!). I am very happy with this purchase.

This product is a great value, because you can extend the life of some speakers that you may have otherwise thrown away. In addition, it has Bluetooth so music can be streamed to it from your phone. Also, it allows me to have a affordable setup in my basement for the grandkids without breaking the bank. The sound quality is acceptable, but I wouldn't say awesome, particularly at high volume. This is due to high distortion at higher volumes. Otherwise, it's fairly impressive sound. Again, a good affordable alternative to buying a full functioning amplifier, particularly when you have some older speakers sitting around gathering dust.