Here's how... get a small 12-16ga wire and i suggest creating a long lead on the wire and wrapping it around the negative lead on one of the rca out's (probably better off being one of the front or rear out's vs. the sub or any video out's) and then twisting it real nice and tight and then taping it to the rca then grab a cable tie (you know those long black plastic/nylon straps that keep/bundle wires/cable together) and torque the cable tie down on the rca over the taped part to secure the wire to the rca and simply ground it to the chassis of the HU. BAM! I had no more noise/engine whine.

Can you take some pictures of this.. my engine whine is driving me crazy... so much so that im thinking of returning the hu.

Here is a picture of me wrapping a wire around the rca end I spoke of above.. Somewhat rudementary, but maybe give you the idea of what we're referring to... Opposite end of small wire goes to grouning point.. some say not to the HU, and/but I have mine to the HU and it works just fine.. go figure..

Then tape it up real good, making sure no wires are crossed/touching the center positive terminal etc.. and then once taped up through a cable tie on it

MH

That seems too easy... ill give it a shot. You have to do it to all of your rca, or just one of them?

I did it to just one.. Now for me it worked b/c the rca's I used are hooked up to amps and stuff ... Not sure what to say/thijnk if you do not have amps hooked up. Do you have amps in you system and stuff?? or are you running speakers right of the HU itself??

i have amps... one for subs, and one for highs

Yup then, that would be all you need to do... some say that doing all 4 is neccessary, but i found doing just one was the resolve for me. Whine Gone...

One other thing.. be mindfull of the gains on amps.. If i turn my gains all way up, or even like 80%.. I do get the whine back.. as it is an input gain it will increas anything in the signal input.. so by grounding the rca and maybe tweaking the gain down to 50/40% then I bet you'lll have no more whine.

just to add .. doing all 4 is, IMHO, overkill as the ground is common in all rca out(s), so doing one is all you would need.. It really should be done behind HU, and maybe even grounded to HU... I only say this b/c that's what worked for me.. you might be able to get an idea of how well it might work by doing the procedure at the end of where the amps are first, i.e. take the rca and do the procudure at the end of where one of the amps are and ground the rca in the back to the chassis or something ...see kinda like a preliminary test result..

thanks.... ill let you know how it worked out

thanks.... ill let you know how it worked out

Any luck?!?!!?

been busy, havent had time to get to it, might get it done this weekend.

been busy, havent had time to get to it, might get it done this weekend.

okay cool just checking in.. curious to know how well it works for you...

One thing I would like to mention as well which might even be easier for you.. is some higher end RCA cables, they have a "drain wire" already attached.. does same thing as you're/we're doing/done but manufactured that way... maybe google or ebay search for rca drain wire will pull up a few.. I know some of the Monster cables have the drain wire... Matt

here is a sample.. but i would be concerned with the quality of this cable but it gives you the idea:

http://cgi.ebay.com/AVW150-5-16-FT-DUAL-RCA-MALE-CABLE-W-EARTHEN-GROUND_W0QQitemZ180168852958QQihZ008QQcategoryZ32833QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

ill ceck them out