Thump when system turns on, turns off, and when selecting sources.
I recently added a Kicker ZX 750.1 to my system to power a single JL 10W3. Im running it in 4ohm to the single sub. There is also a JL 300/4 running my mids/highs... and before the kicker amp the 300/4 ran the whole system including my sub. Never had this issue before.
I just installed the amp... and ran a new RCA from front to back to the Kicker amp. Ive noticed I get a loud thump from the sub when turning on, turning off, and also when switching from CD - line in - radio - etc. Each source produces the thump.
Ive read up online so I have some things to check but thought Id ask here in the meantime.
Couple things... the new RCA isnt the greatest of quality. The remote turn on is routed right next to the Kicker amps power wire, literally on top of it.
Oh also... the amp has a feature to turn on by 12v remote, DC power from the 12v in, and also RCA input. It does this with all 3 settings.
Things to do....
Check all your grounds. They should be to bare metal, and short as possible. HU ground should not be using the factory ground. Ground it to the dash frame.
RCAs should not be ran next to your power wires.
If that doesnt work, ground your RCAs to the chassis of your HU.
If all that doesnt work, use a ground loop isolator. (non-sponsor link removed)
Last edited by WhiteBird00; 03-13-2012 at 08:33 AM.
Reason: non-sponsor link removed