static only when key is at III

[patrick4588]

swapped the ground on the head unit and that eliminated all the noise when the key is in II position. its perfectly clear now. but when i turn it to III i get some static. so lame. i tried ground loop isolators, but that didnt help. this is with the engine off btw, only the key is in the III spot

Pioneer Premier 780mp Head unit
MTX Sledgehmammer Enclosure t7512-44 subs
MTX Thunder Elite Amp 801D
MTX Thunder Elite Amp 404
MTX Components
MTX Coaxials
NipponDenso High Output Alternator
StreetWires Zn2 Rca's
Tsunami 2 Farad Capacitor
Tsunami 4 Channel RCA's
Tsunami Battery Terminals
the full system was about 3000 retail. i still need to carpet the board and put the interior back together, but on to the pics!!

http://i108.photobucket.com/albums/n5/patrick4588/IMG_0316.jpg
http://i108.photobucket.com/albums/n5/patrick4588/IMG_0317.jpg
http://i108.photobucket.com/albums/n5/patrick4588/IMG_0318.jpg
http://i108.photobucket.com/albums/n5/patrick4588/IMG_0319.jpg
http://i108.photobucket.com/albums/n5/patrick4588/IMG_0313.jpg

[b@d @pple]

vehicle running or not running

[patrick4588]

engine off.

[b@d @pple]

does it have static when engine is running,if not it could some how be a volatage issue

[patrick4588]

i have not started the car yet, but whenever the sytem is on, i have battery cables hooked up to a running car.

[sikfricks]

i work at circuit city and this happened to me it ended up the amp was bad after i put 200$ rcas and those that ground loop bull**** but i just noticed you had a pioneer radio put a ground wire to the radio housing (cage) it might fix it

[redgst97]

You have your non-running car hooded up to a running car's battery??????????

I figure this is only for "testing" purposes while you are building...right? I suspect that mihgt be worth looking into...try running the stereo without the other car running...just use jumper cables for 10-20 seconds. See if THAT makes a difference.

[patrick4588]

will try tomorrow. and yeah its just for testing stuff. i already have the pioneer radio grounded directly to the chassis and have the battery grounded twice. the noise is proportional to the amount of gain i turn up. i dont think its the amp since it works perfect and sounds great with the key at II.

[patrick4588]

still had the static. i unplugged the rca's and it quit, so i guess i need to try some different ones

[patrick4588]

swapped the rca's and moved the ground on the amp. got better, but still there. getting alternator whine now. weak sauce