Douk Audio Upgraded 50W+50W Wireless Bluetooth 4.0 HiFi Audio Receiver Digital Amplifier Board with Case and Heatsinks: Enhanced Audio Performance and Protection Review

Bluetooth doesn't work, doesn't show up, tried on multiple devices. Luckily it has an AUX input, but the sound quality is absolutely abysmal, no bass, no mid-bass, none of the buttons work. I spent more money because of the radiator and wish I didn't have to.

This is the fourth unit I have bought and I am happy with all four. There is some hissing when the volume is cranked up, but that's not a bad thing. This device differs from the others, comes already mounted in a case and also has an entry for an additional cable, although neither the case nor the additional entry are visible in the picture. Good bonus.

Excellent, would buy again. The case holds up well, the buttons work great. The board is solid and hooked up to multiple sets of speakers including 60w 8 ohm home speakers and some 50w and 100w 4 ohm 4 inch dual channel speakers and they all sounded great. I built it into a small solid wood bluetooth boombox. It's not very spacious. Wrench I used: Philmore right angle DC plug with 6ft cable - 2.1mm ID, 5.5mm OD: TC210

available The device works BUT at first I thought it was the 12V power supply I'm using, but then I connected a 12V DC battery as power supply (instead of the power supply) and the device still makes distinct noises. Floor. DIP switches actually make the noise level worse than the factory settings! The noise level is actually largely independent of the volume setting. A constant hiss + high frequency is added. This is audible, especially if you have young ears (that is, people under 70!). I…

Definitely not 50x50 watts but still works. Too bad it didn't have a power switch, I had to buy an on/off switch separately. Poor sound quality at any volume - there's always background noise and a hiss/hum/squeal when no music is playing. When turned on, it plays a LOUD tone indicating the power is on - I wish it was a little quieter. DIP switches don't affect sound quality, only volume. Think a little static and lower audio quality, then this works great. For music or even talk shows or…

I bought this amp to power a pair of refurbished 4" bookshelf speakers in my garage. It's not that powerful, but for small speakers at reasonable volume, it's a great amp for the price. Distortion gets quite severe at high volumes, so if loudness is what you're looking for, look out for something else that's stronger. (when connected) is not as advertised but wasn't difficult to find and connect. Even in an acrylic case the dimensions are tiny. The 12V 6A power supply I use for this is larger…