ok around 3 wks ago, i went out to my car. i adjusted some gains and played around with different settings. around a day later, while traveling down the road, a LOUD SCREECH/grinding noise comes through my speakers. turned the hu off and back on it was going, happens again. i thought something was killing my battery, turned the sub level down the neg 25 and i still get the screeching to make a long story short. read out from the HU is 13.9-14.1v. could it be a bad ground somewhere that is causing all of this trouble or could it be a sign of a bad battery/alt? i had both checked around a yr ago and they turned out fine, but that was a while back.
any tips? i am planning to do the BIG 3 in a couple of wks try and eliminate the dimming of my lights.
880prs, seas er18mids, seas tweeters, x200.4 and pioneer gm-5100t amps, 1 dayton ho 12.
power wire from the batt to the pos distro is 4awg, from the pos distro to the amps are 8 awg.
any help would be great appreciated.
p.s. = amp doesn't go into protect as far as i can tell, voltage doesn't drop from the read out of the hu and happened with 2 different 880prs'