Engine Noise through Speakers

Originally Posted by billet370

let me ask one more question.... where is the best area to ground the headunit at? I have tried 2 areas but figured i would try one more. Also I have the Mute ground, the green ebrake wire, and 3 black grounds all tied together leading to one ground. Wanted to make sure that was overkill or if i would try and limit the number of grounds i connect..; assuming it doesnt matter since its a ground but let me know and let me know about location used in 370z's.

thanks guys for you feedback on this. Im with you bigaudio and think its the headunit but going to try one more thing and then calling it a day lol.