Wow! this amp works way better than I expected, I'm so glad I opted for the Bluetooth option too. I'm running mine for a project in my car, the DC 12v car battery supply makes for clearer audio, I did try this amp with a bench PSU converting AC to DC but I could hear the AC hum in the audio. So be aware a good power supply is required to get the cleanest sound from this amp. Radio works well, USB works well, Bluetooth works incredibly well. Audio jack in is good too. Turning this up to max volume is loud on a set of 60W speakers, but with distortion - a better set of speakers might fix that, I'm still very impressed with the amp, it is perfect for my requirements.
Poor sound quality