BT connectivity is quick and easy. This Amp is seen as "Fosi Audio MC101".
As an alternate, having RCA input is a nice feature, and I may use it that way - going forward.
Bass and Treble controls do have an affect on the audio Tone/output.
The output is Hi-Fi and distortion-free. I ran it continuously at full-volume (and a decent input level) for 1/2 an hour and the amp remained cool to the touch.
The build quality is awesome. All metal construction, and the round VU meter adds to that legacy/vintage touch.
The supplied PSU appears to be a good one. It's rated at 4.5A right from 100V to 240V AC - making it universal Voltage compatibility.