The speakers work, but the sub does not. It only makes sound when you are turning the knob for the bass, but it is a bunch of static that goes up and down in volume. All my cables seem to be fine. It is connected to a surge protector, but I will say I have a room a/c that is 10,000 BTU and makes the lights in my room dim. Is the AC damaging everything else with the power surges coming from the compressor? Just a random thought. Appreciate any help!