me and my friend took out my stock amp, 1995 gsx. we put in a new 4 channel amp. we got done and then i had a whine noise that went higher when i reved the car. i did some research and was told to install ground loop isolators. this took away the whine and made my subs loud again. (before the ground loop i could tell they had lost power) so now here is my problem. when i went to put the ground loop isolators in the dash and tuck them away my whine came back. i have to hold them out in front of the head unit in a certain position just to make the radio clear. how can i put these ground loop isolators in the dash and make sure i dont have to worry about the position of them and have a worry free system? i put isolators on the rear and front speakers.
Have you checked that it is really a good ground with a DMM??? Are your rca's on the opposite side of the power wires?? Try upgrading the big three. What kind of amp is it?? Crappy amps can cause noise because of internal grounding issues or something like that. My friend hooked up a jenson 720 watt amp in his eclipse and got major noise but when it was in my car it was fine.
i dont know what a dmm is but i grinded it down to the metal. its not the RCAs. i bought a new pair and hooked them up inside of my car. i ran them over the seats and to the amp so they are no where near the power wire and it did the same thing. both pair of RCA cables came in clear with the ground loop on them. mine is also a jenson amp and it worked beautifully in my firebird. i actually have the same RCA cables that were in the fire bird hooked to it in my eclipse.
Well a dmm is digital multimeter. Well my friend also has an eclipse and that 720 watt amp would go crazy...maybe its just eclipses haha
well tell him to install the ground loop isolators. walmart sells them for 13$ apiece. if he figures out how to get the isolators to fit in the dash and still work let me know
Well the Jenson was mine but I sold it a couple months ago...He has a lightning audio 300.2 amp right now and it does fine...no noise or whine.
I would check the ground from your engine to the battery, and then the engine to the chassis. That noise is alternator "fuzz" it's intermittent, right..? like it increases to a higher frequency at high rpm, and is sometimes loud, and is sometimes quieter? some sony head units were good "noise conductors". If changing the engine's grounds do not help, then try grounding the HU directly to the battery, bypassing that portion of the dash's wiring.. The ground loop isolators really aren't great.. I have used them before, and never been able to obtain the desired results. and did you say that you ran the rca's "over" the seats?:huh:
yes you know how they said not to turn the rca cables near the power cable. well with the head unit out i connected brand new rca cables from the head unit and instead of running them under my carpet etc etc etc.... i just took them over the seats to my hatch and to the amp. it was quicker than running them the right way just to test the rca cables. how would i ground the head unit directly to the battery?
just run a wire straight from the black on the back of the HU to the neg on the batt. (or junction block) just be sure that your power wire is properly fused (through the dash fuse panel)
