I just had my sound system upgraded to add a new 2 channel RockFord Fosgate 1000 Watts amp, an EarthQuake 1.5F capacitor, and a 12" Punch sub in the trunk.

the setup is pretty sweet and the sound is great.. however i'm now hearing the engine noise inside the car!

i'm not talking about static through the speakers, the noise seem to come from behind the glove compartment, right where the power cable of the new Amplifier was routed through the firewall to the battery in the engine compartment..

the wire runs through a rubber seal type of thing, and i felt it myself.. it's there, seemingly intact

what could it be that the installers have messed up? it's really bugging me

Any comments? Please? :'(

 

The 4.6 is a bit noisey anyway, could be that the cable install was enough to cause your problem.

 

Stuff a sponge into the grommet around the wire to block out anything. Or, get some deadener and go nuts. See my posts about sound deadening in the Interiors Forum.

 

that's exactly what was done and the noise is completely gone!
i wanna get some more of the material and go around the car sealing off every hole i could see