justin_garrett Posted February 19, 2010 Report Share Posted February 19, 2010 i'm have a feedback problem with my subs and amp ive had them in my car now for a couple of weeks and they where working fine but today i decided to take the head unit out of my wifes car and put it in mine and i got eveything hooked up and now im geting feedback i know the rca outputs are good becuse there is a system in my wifes car and it worked fine in there so im stumped and cant figure it out so does anybody have any ideals of what it could be here is the headunit i just put in http://www.pioneerelectronics.com/PUSA/Pro...ers/DEH-P2900MP here is the one i took out http://www.docs.sony.com/release/specs/CDX..._Spec_Sheet.pdf Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
justin_garrett Posted February 19, 2010 Author Report Share Posted February 19, 2010 ttt Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
ilovetoinstall Posted February 20, 2010 Report Share Posted February 20, 2010 is it like a high pitched whineing noise? Quote Greg, Triple C Auto Niagara Falls NY Under construction2002 Chevy Suburban pioneer 8000NEX 3 Sets of ARC Audio 6000 components in custom front doors 2 Powerbass midrange in center council 4 Super tweets 2 Focal 900.6 6 channels 4 American Bass VFL Comp 15's (currently running 2) DC 12.0k DC Power dual alt bracket 2 XS Power D3400's under the hood 3 C&D technologies 110ah in rear along with multiple runs of 0 AWG OFC Link to comment Share on other sites More sharing options...
justin_garrett Posted February 20, 2010 Author Report Share Posted February 20, 2010 no its more of a low deep noise if i set my filters on my amp a little higher i cant hear it but when i turn them back down its clear as day im starting to think the rca jacks on the head unit have gone bad because i switched my old head unit back in to see if it went away and it did so is there any way of testing the rca jacks with a dmm to see if they went bad Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
kmalinich Posted February 20, 2010 Report Share Posted February 20, 2010 I don't think that's "feedback" ... It sounds like power line noise.. how deep is this "low deep noise"? And no, there isn't really any way to test them with a DMM. Quote Link to comment Share on other sites More sharing options...
justin_garrett Posted February 20, 2010 Author Report Share Posted February 20, 2010 its at least id say at 25-30hz Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
ilovetoinstall Posted February 20, 2010 Report Share Posted February 20, 2010 do you have a 4 channel hooked up? if now its ground noise you prolly blew up the radio you can try a ground look isolator sometimes it works some times it doesnt if it doesnt run a solid ground to something on the car ex. chassis sheetmetal ground the back of the radio then ground the rca shields on the subwoofer rca's Quote Greg, Triple C Auto Niagara Falls NY Under construction2002 Chevy Suburban pioneer 8000NEX 3 Sets of ARC Audio 6000 components in custom front doors 2 Powerbass midrange in center council 4 Super tweets 2 Focal 900.6 6 channels 4 American Bass VFL Comp 15's (currently running 2) DC 12.0k DC Power dual alt bracket 2 XS Power D3400's under the hood 3 C&D technologies 110ah in rear along with multiple runs of 0 AWG OFC Link to comment Share on other sites More sharing options...
justin_garrett Posted February 20, 2010 Author Report Share Posted February 20, 2010 the amp is a mono block and its the only one in the car i dont think i blew the radio up because everything else works im just getting the noise from the amp and subs just with this head unit when i putt the old one back in its gone thats why im stumped about it ill try running a ground from the body to the back of the head unit and see if that help's but im not for sure about how i would ground out the rca shield's on the subwoofer rca's Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
treossi Posted February 20, 2010 Report Share Posted February 20, 2010 sounds like rca's ran over power wire, or gains up too high Quote Team sundownWESTCOASTSPL.COM we're throwing dbdrag events very soon visit the website for details Link to comment Share on other sites More sharing options...
justin_garrett Posted February 20, 2010 Author Report Share Posted February 20, 2010 the rca's are ran down the center of the car and the power down the driver side and the noise is clearly there at about 1/4 of the gain Quote 1998 neon R.I.P 137.5 db's Youtube videos http://www.youtube.c...tingarrett64067 2000 Eclipse Headunit = pioneer avh-p1400dvd Subwoofers = 2 DC audio lvl 2 12's Amp= Vibe bass 5 1500rms @ 2ohms Single run of 0awg power and ground wire ( Big 3 wire upgrade comeing soon ) Link to comment Share on other sites More sharing options...
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