View Full Version : One sub sound great

02-26-2014, 10:21 PM
When I plug in the rca from the cd player to the amp, when I plug in the red the right sub sounds good, but when I plug in both they both sound bad.

Side Show
02-26-2014, 10:40 PM
search for ground loop through rca's

02-26-2014, 11:02 PM
Check polarity at the subs.