Need help with alternator whine

[Mitsouko1]

When I install a Pioneer EQ (DEQ-7600) i recently got, I get considerable alternator whine but without it everything is fine and it disapears. I have a Pioneer Head Unit running to a JBL and Infinity amplifier. I cant figure out what is causing it and any help would be welcomed.

[Corollacrazy42]

I think this might just happen if you have two amps or something.. mine does it too. I heard you ground for both amps need to be close together and that can cause some noise.. but really it doesnt bother me

[drehtwnftbl]

if it's the alternator whining, it just means that the alternator is trying to keep up with the demand for power. you might burn the alternator out faster than normal

[Mitsouko1]

I have both the amps grounded to the same location in the trunk and have a new high output alternator so I dont think thats the problem. Everything works fine without the eq installed, only when I install the eq do i get the problem. Maybe try a new ground for the headunit and eq????

[Fever]

Yes, try new ground point for the hu and eq.
Alt whine coming thru the speakers is usually a ground problem.

[hiace24]

Get a noise filter.
They look like this:

They are effective against 'engine hum' and 'ticking' caused by alternators, ignition coils & spark plug leads

[atobe]

what you need is a "ground loop isolator" either than or re-run your wires...pioneers tends to have the alternator whines.. i have a pionner HU and i get it then i re-arranged the power to amp wire away from all the speaker wires and it went away

[rexrunner]

first off, that whine from the over use of an alternator is a old wives tale. the whine is caused from a bad ground (paint not scraped off) or the power wires being ran to close to the patch cables (RCA). try to check your grounds and then check the rca's.