MakerHawk Blue Tooth Amplifier Board HiFi Stereo 2.0 2X50W Audio Amplifier Module TPA3116D2 Digital Power Amplifier Blue Tooth 5.0 Dual Channel AMP with AUX/USB/Flash Drive/PC Sound Card Input

Made an excellent low cost Bluetooth speaker out of an old center channel surround speaker. Only negative is the annoying voice the says “Bluetooth mode” when powered on. A simple beep would be better.

Definitely use an old computer power supply as it seems to handle and work better with higher input voltage (it can handle between 9 and 24 volts). My supply is 19V and is connected to my iPad and to two 8 Ohm speakers. Plenty loud enough.Be careful not to place it on something metal, as some of the circuit board's solders protrude through the base, slightly/ just enough to make contact. You could tape over them. I glued a base onto mine.

Pretty easy to put together with the provided screwdriver, even though there are no instructions. I had to look at the pictures in the Amazon listing to see how and where to put the heat sink. There a little insulating sheet that goes under the pc board, with holes where there are wires on the bottom of the pc board. The underside of the power and speaker connectors extend into and thought these openings. The screws that hold the amp together raise it just enough so that they don't touch a flat surface, but if it were set on a coin or key, for example, you might get some sparks.The sound is great. I'm running it with the 12 v supply from the 20 watt x2 amp I had, that became scratchy or noisy after 10 years or so, and volume is plenty for me, with a pair of little Yamaha NS10 speakers. It also looks nice.I'm using stranded 16 AWG wire to connect the speakers, and it's a little hard to get into the screw connectors. You have to get all the strands straight. Also they are really close together, so watch out for stray strands that could cause a short.The amp is so tiny and light I had to be careful how the speaker and power wires are arranged so they don't pull it around.

pros: versatile, small and funcons: it requires high input voltage for just 2x50w output, I can run another board (3x100w) on medium volume using just 5v input

Had no clue what to expect, figured it may not work since the price was so low. Boy was I wrong. This little amp has some heart. Sounds absolutely amazing! I highly recommend!!!

Does its job. Bluetooth connection strong enough to reach my phone across 2 rooms. Auto-connects once paired/detected, so have to disable (original source bluetooth) & re-pair if you want to change devices. Power-button is "springy" and can pop/fall out if not careful. Would have preferred a single (twist) on/off/volume knob instead.

This little fella is just great. Sure, it requires some basic assembly - a kid could do it - but it puts out the power and drives my monitor speakers just fine. Very, very happy with this purchase.

I recomend is cheap works good.