my old ass 800w 4 channel rockford fosgate amp is dying. two of the speakers sound really shitty, and it overheats really quickly. i decided to replace the amp and i got a 1000w 4 channel phoenix digital amp. i know the new company isn't great, but i just need a cheap fix, as i don't have too much money these days. so anyways last night the amp was installed and when i tried to test it out i got a really high pitched buzz/hiss sound out of the 4 speakers, and no music. does anyone know what the problem could be?