This is a stereo amplifier with mono FM radio. When played back at an acceptable volume in a living room, there is no volume compensation. Equalizer is useless and sounds awful, BT connected to my phone with no problems but sound quality is almost as poor as FM radio. I didn't check the AUX input, actually bought it for FM and made a stereo guess, yes I asked the question after ordering and got the answer "must be". It works, it's good value, if your expectations are low it might be a good buy. I will continue to use my FM stereo boombox in my office, it has a much better sound despite having this amp hooked up to good bookshelf speakers. Note that there is no stereo for FM or BT as BT is single channel by design. I have found the FM reception to be poor compared to any other radio I have. Would have been better off paying double for better quality in FM and tone control, too bad to go back to looking for something to fit the room.
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