Stereo Gurus Needed

[Paradoxx]

Having so much cable between power source and the amp could be the reason for the noise being bigger than it is in the stock setup (I can hear it in my car which has a stock stereo setup). Running a power lead from the battery is inevitable and should be kept as far away from signal sources for obvious reasons, but putting the earth cable back to the battery is basically doubling the amount of conductor which is acting as an antenna picking up spurious signals from the alternator among other things. Try keeping the earth cable as short as physically possible. Your car's body and the negative terminal on the battery are effectively the same point. A large cap to your amp may fix your problem but are mainly designed to act as a secondary battery for every time your sub pumps out heaps of power. I dont think it will stop any noises like this. You might be better getting a small cap to short any signals to ground on the main power lead. You can buy these from supercrap for a few bucks (noise surpressors). Caps will allow any noise signals to short to ground but acts like an open circuit to DC.

Hope this helps, I'll be happy to answer any questions u might have. good luck!

Steve.

[xlr8ed]

Running direct power from your battery fixes the problem..As it did with both our cars..

[Max Power]

When I had the clubsport, the audio gurus on the ls1 forum posted info on how to tap onto the pcb before the built-in amp in the headunit and run rca plugs. There was no noise compared to the line level convertors used before.

What say you gurus about doing something similar with the BA headunit?

Max

[Blown BA]

Running direct power from your battery fixes the problem..As it did with both our cars..

<{POST_SNAPBACK}>

Very nice Jeff

[YOOT]

I experience no noise what so ever, I ditched the factory ICC from the start and went with an aftermarket Head Unit.

I am running a JVC MP3 Player/CD/Tuner where the tissue holder was, it runs of the its oen power source from the battery/ignition and grounds to the body of the car.

I run RCA's under the tranny tunnel to t behind the front seats where I have 2x Kenwood 4x100watt RMS amps mounted on the back wall of the cab.

They power 1 JL Audio 12" sub which is behind the passengers seat, and a pair of MB Quart Reference series splits, 6.5". The cross overs are mounted in the bottom of the front doors, bloody huge things, as big as amplifiers. The tweeters are mounted coaxially on the centre of the woofers.

I have no noise, of any shape or form, its so quiet I can't even hear the usual hiss from noisy recordings, but road noise is much louder than that I suppose.

I'd say your main problem is the crap factory thing integrated to the even more crap ICC.

My ICC is still powered, and I can still turn on the stock stereo, I have the cables hanging in the doors ready for the stock speakers to go back in when I sell the ute and everything will function as normal.

[NighEve]

Really appreciate the replies so far - I will not get a chance to get a suppressor or cap until the weekend, but will then have a go at fixing it and hopefully will have some better news to report.

Thanks particularly to XXXRT (you have confirmed my suspicions. And thanks to BCR01 - I didn't see that in the jaycar hardcopy I had on the weekend (I buy all my wiring and fuses etc from jaycar - no wank factor, just good quality equipment).

Jeff - I am running direct power from the battery with 4ga power wire into a 2 way block (to each of my amps). The problem it may seem is I am running 2 x 8a earths back to the ve- on the battery - as was described above; besides my good intentions I think this is not helping.

Rednutt - I wanted to avoid an aftermarket headunit at this point of time, although I do know the benefits of running the cleaner RCA signal as described.

Joel.

[Trough Lolly]

number 1 tip for speaker whine.

if using more than one amp, run ALL earth cables to the one ground point. more than 1 ground point will cause this. not a crappy single screw either, make it a hefty tek screw minimum! (scratch all paint back if painted surface)

and also, DEFINATELY use direct power from the battery!

[NighEve]

Trough Lolly - I agree, that is why I have run 4ga power from ve+ and twin 8ga (one from each amp) into the ve- on the battery using large goldplated hex screw terminals. My point was that I think running the earths back to the battery may be picking up the alternator whine. I will try grounding them under the seat mounts and also a sound suppressor to see what this does. The problem has not been caused by taking short-cuts I can assure you.

Joel.

[XR6PSI]

I'm running standard ICC twin stinger in line convertors to a 4 channel kenwood amp running 4 factory size JL 5x7s and using Line out on the Kenwood to a Alipine 350mono blockrunning a 12"Dual 4ohm Voice coil JL sub mount ed behind drivers seat facing the passenger wall. No noise interfearence very controllable and surprisingly sounds a lot better than when it was in the AU sedan I Had previous. 4 Channel is under passenger side seats and Mono under drivers. Power down passenger side and accross to drivers side with single earth source. (passenger seat mount). I agree that running the earth back to the battery could pick up the alternator whine and as such have always had very short earth leads from amps. I was advised by a few audio mobs that running a line booster (signal booster etc) would amplify the whine along with the preout voltage and that would be worth trying without first. Perhaps this might be the cause. I would start by reducing length of earth wire and go on from there.

[bob^]

GOt mine all installed yesterday/today. I too have engine noise. It's mainly comming from the right speaker outputs of the headunit as if I disconect that, I have no noise. So ATM ive got the left signal running the whole system which is very very garbage.

My power cables run down the right side of the car, along the loom that the factory speaker wires go down, so Im guessing I'm getting the noise from there. Will give it another go, rewiring it, and if not, it all goes back to standard, or I get one of the new JVC DVD headunits.