i have just finished installing my system in my truck and it sounds great but i notice my speakers have some feedback noticeable when the song has a quiet part in it. it is also present when the engine is off so this rules out alternator noise. i ran my power wire down the driver side and my rca and speaker cables down the passenger side. i checked my ground and cleaned it up but it is still present. any ideas?

my setup:

clarion dxz785usb headunit

set of energy components with original crossover in front (4ohm) powered by alpine mrp-f300 bridged out to 150x2 rms

pioneer shallow mount 2 ohm 10 inch sub powered by jbl 600.1

old *** rockford 1 farad cap

truck is a 2006 chevrolet silverado

 

what does feedback sound like?
does its volume change with system volume?

 

The sound gets louder with volume and it sounds like a hiss or clean sounding white noise

 

In my bonnevill if i plug anything into the over head console's 12V power outlet i get noise. Got a cell charger/ipod/anything into a 12v outlet?

not 100% sure but dont caps go bad after awhile?Maybe i could be thinking wrong on that tho.

 

unplugged my charger nothing pluged in at all. didnt help

 

What are the settings on the deck? Some decks have a loudness setting that when on can add a hiss that is audible when there is no sound. If there is a loudness setting try turning it off. Also try setting your eq to flat and make your adjustments until you do hear it, then you know how to avoid it.

 

Turn the gains all the way down on the amps, Turn the volume up as high as it goes witout distorting using a well recorded CD.. then turn the gains up slowly untill you can start hearing distortion. Back them off a hair..and there you go. 90% of the time the gains are set too high/improperly.

 

^ Absolutely. 90% of the time noise can be fixed by turning down the gains.

 

Well I turned my levels down and serarched my decks settings tried different configurations and still same problem

 

Take it to your local reputable pro to have a look at it