Sometimes it sparks and makes a loud popping sound like the speaker's going to blow

a high degree of background noise clicks pops etc

The only drawbacks, and they might be attributable to bridging it, are that it has a very low static-like hiss when there is no music and a very loud "pop" when I turn off the power

Annoying pops and clicks when powered on

Tried two of these boards, and both exhibited a loud POP of distortion when pausing music

I also had to change a resistor inside the unit two Lower the loud popping sounds that it makes during power on and off