sound is terribly low i am using this player with song bird 2x 4inch and 2x 6x9inch speaker all setup is new but volume is tooo low even in max volume dont know what is exactly issue is tried max bluetooth audio in phone aux cable pen drive same issue low sound wiring is properif you are using samsung old phone then you might face bluetooth audio is shatter and lags too much all other things are goodnot satisfied with max volume output of this player detachable panel disad