Hilbilly Jack
Full Access Member
Was still on the hunt for why I get a humm after driving about an hour. Eliminated the sub system because it's wired to Aux 1 and I can turn it off. I did find that the filters were on Low pass instead of High, not related to the issue, but much better sound. When the main amp is off, no humm so I knew it was in there somewhere. Suspected maybe an RCA jack issue since the system had been installed at least 5 years ago. Pulling input cables 1 by 1 it is indeed related to one of the RCA jacks for channel 1 & 2. Now to solder in a new jack and see if it's the jack or the cable! Crazy thing also is that it sounds great (until it gets hot) with either DVD or USB, but "Fuzzy" highs from Sirius, but I think switching to High Pass fixed that but it may still be related to the bad cable / jack.