I recently unhooked my subs so that i could finish sealing my box. After sealing the box and installing them i noticed that there is now a high pitched noise and a low pitced noise coming through the subs. The high pitched noise is really noticeable but can removed if you turn on the low pass filter. What could be causing this problem?
Noise enters the system through bad grounds, bad RCA's or just bad equiptment.
try to relocate the location of the grounds. try to change the RCA's, different brand and different path. whichever is easiest to try first. also don't forget about the HU ground.