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<blockquote data-quote="95Prober" data-source="post: 812514" data-attributes="member: 557984">yeah squeak9798, i have a probe and they have an internal amp to run the rear speakers, not sure if all 4. i think the dealer by-passed that amp though. never took it out. its just there unhooked im certain. i bought an external amp for the 4 speakers but didnt hook it up yet. i was getting noise even with only the bass amps i have. oh, so the big3 wouldnt help. is the big3 more for dimming and soild grounding/ better power?also, just for fun. i took some short pieces of speaker wire and attached them to those screws on the side of the HU, and when i touch a metal point near the deck, off then on, you can hear the whine decreases but doesnt entirely go away. when i untouch the wire from the metal , it goes back to normal again. i think my HU is grounded using the car&#039;s existing black ground wire. i&#039;ll ahve to remount it another place.&nbsp; where on the chassis is a good place? go right to the battery direct or is that not safe?&nbsp; or run it back to the trunk where my amps are grounded? i heard that its a good idea to use the same point?&nbsp; dunno?thx!</blockquote>

[QUOTE="95Prober, post: 812514, member: 557984"] yeah squeak9798, i have a probe and they have an internal amp to run the rear speakers, not sure if all 4. i think the dealer by-passed that amp though. never took it out. its just there unhooked im certain. i bought an external amp for the 4 speakers but didnt hook it up yet. i was getting noise even with only the bass amps i have. oh, so the big3 wouldnt help. is the big3 more for dimming and soild grounding/ better power? also, just for fun. i took some short pieces of speaker wire and attached them to those screws on the side of the HU, and when i touch a metal point near the deck, off then on, you can hear the whine decreases but doesnt entirely go away. when i untouch the wire from the metal , it goes back to normal again. i think my HU is grounded using the car's existing black ground wire. i'll ahve to remount it another place. where on the chassis is a good place? go right to the battery direct or is that not safe? or run it back to the trunk where my amps are grounded? i heard that its a good idea to use the same point? dunno? thx! [/QUOTE]

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