I coupled this board to an SMPS300RS regulated power supply, feeding it with clean and adequate power at 24V. Overall the board does what it advertises and the build quality is very good, with the exception of the cheap plastic knobs. I would only review the sound quality which, although powered by a decent supply, is subpar to entry HiFi standards, do not expect do get a sound like a decent inexpensive integrated amp, The class D circuity implemented in this board lacks clarity and instrument separation, sound thick overall. I compared this board sound to a TEAC integrated class D amp I have rated at 2X20W @ 8 ohm using ICEPOWER 2X50W 4 ohm circuity, and the TEAC win hands down. Also this board has an integrated DAC with DSP capabilities, as shipped the sound seems too bright and I needed to reduce treble way down to be at an acceptable no fatiguing level. Also the bass seemed elevated, so overall I guess a U type of preset is available boosting lower and higher frequencies. In order to be able to tune the DSP settings yourself you need to purchase a $20 software that gives you access to the internals of the DSP of the DAC. I do not have this at the moment but its a must if you are serious about music quality. Overall 4 stars, the one star missing is for the amp section of this amp that is lacking, but as they say you should not expect so much for a €95 board, it is a very good choice for TV bars or Bluetoorh style small speaker.