battery wire for amp

[dirtymax]

i just got a new truck, its a 2001 ford powerstroke. i put a system in it and it worked fine for about 2 weeks. first off the 4 channel amp powering my speakers started picking up alot i mean alot of engine noise and popping sounds. i checked everything i could think of. from power and ground connections to the rca's. then the sub amp started blowing fuss's and going into protection. since the truck is a diesel it comes from the factory with 2 batteries would that make any difference with the power wires for the amps?

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[dleccord 5,000+ posts]

reroute your rcas again to see if that helps with the noises. or you can try and take them out and then turn on your amp to see if you have noises then, if yes then it could also be your amp. but i would definitely check with the connections of the rcas; sometimes fiddling with the rca heads will cure the problem.

 

[Prowler573 5,000+ posts]

Where are your two amps grounded? What can appear at first to be a good grounding spot can ultimately be not nearly as suitable as you might think.

While it's a commonly held urban myth that your RCA cables' proximity to your power and/or ground cabling makes a difference regarding inducted noise or the lack thereof please let me assure you it makes no difference whatsoever assuming everything else is properly connected/secured.

 

[AK SloPok 10+ year member]

Are the amps touching the chassis of the truck, if so, you may want to isolate them. Even though you have looked, you may try to find a loose RCA or speaker wire that is shorting. The loud bangs and pops will put undue stress on the entire system and maybe enough to blow a fuse.

I agree it may be a ground issue. Get a digital multi-meter and check your resistance at ground, also check your remote wire for correct voltage.

 

[dirtymax]

what should the voltage be on the remote wire? the amps are sitting on the floor under the back seat, they are screwed down into the floor. the amps are also grounded to the floor of the truck, i sanded the area down to bare metal. i also put brand new rca cables in it and it didnt make any difference in the noise problem. the sub amp blows the fuses in the amp and not the inline fuse by the batteries right when you turn the key.//content.invisioncic.com/y282845/emoticons/crap.gif.7f4dd41e3e9b23fbd170a1ee6f65cecc.gif

 

[dflw_99 10+ year member]

well,

if it were me, i would take it all out and reinstall it. did you instill it the first time?

 

[dirtymax]

yea i put it in. could it possibly be in the head unit?

 

[AK SloPok 10+ year member]

Are you sure that your subs or speakers are not the culprit? It sounds like the output of the amp is a problem where either the speakers or wires are grounded to the chassis. This would cause the amp fuse to blow and bad feedback.

You also could try not screwing the chassis of the amp down. Unscrew them and let them sit on the carpet for testing. I have seen some amps sensitive to being grounded, some have little rubber feet to isolate vibes, maybe those are missing.