SMZ2 Posted June 12, 2014 Report Share Posted June 12, 2014 I have an mb quart 4.125 and alt wine. I ran new wire everything. I have checked all the grounds, rcas, speaker wire, and fuses. After swapping out I still had noise. Then I swapped the mb quart with my old 2 channel and boom noise was gone. All the wire was still the same from the mb quart. Is the mb quart bad? I bought it lnib second hand. Am I missing something. Swapping and losing noise sounds like a bad amp to me. What do y'all think? My Build Log!http://www.stevemead...nissan-xterror/ Check the Youtube Channel for Updates!http://www.youtube....ser/Xterror2002And Seller Feedbackhttp://www.stevemeadedesigns.com/board/topic/163179-bought-from-smz2/#entry2363713 Link to comment Share on other sites More sharing options...
PortSideAudio Posted June 12, 2014 Report Share Posted June 12, 2014 Where do you have the ground grounded at, and what size wire are you running for the ground? 2002 Toyota Corolla Pioneer DEH-80PRS Soundqubed Q1-2200d Soundqubed HDC3.118 Soundqubed Q4-120 Alpine SPR-60 Alpine SPR-60C Link to comment Share on other sites More sharing options...
Weigel21 Posted June 12, 2014 Report Share Posted June 12, 2014 How is the contact poit for the ground connection at the vehicle/chassis? Was it scraped down to bare metal? Has rust/corrosion developed over time? You say the 2-channel works fine, which I'm going to ASSuME the 2-channel is a less powerful amplifier and thus demanded less amperage. The ground connection wouldn't have to be quite as strong to support powering it. Link to comment Share on other sites More sharing options...
SIDE SHOW Posted June 12, 2014 Report Share Posted June 12, 2014 does the 4 channel have noise with only one set of rca's connected? i'd bet soon as the second set of rca's is connected into the 4 channel amp your getting a ground loop through your rca's Link to comment Share on other sites More sharing options...
PortSideAudio Posted June 12, 2014 Report Share Posted June 12, 2014 I was looking at your build log and it looks real good, so i don't suspect this is a problem, but is your ground wire the same size as your power wire? 2002 Toyota Corolla Pioneer DEH-80PRS Soundqubed Q1-2200d Soundqubed HDC3.118 Soundqubed Q4-120 Alpine SPR-60 Alpine SPR-60C Link to comment Share on other sites More sharing options...
RooTxBeeR Posted June 12, 2014 Report Share Posted June 12, 2014 One thing I am thinking of, since some amps require different RCA technology. That you need to ground the RCA's. On 11/20/2012 at 8:54 PM, AMI CUSTOMS said: Turned mine up today at a light, guy next to me his steering wheel started moving and he looked over at me like I was a magician lol. On 5/9/2012 at 8:45 PM, skittlesRgood said: fuck the plating. look at what the main metal used is. you could buy unicorn blood plated terminals but if its just covering up dog shit, whats the point On 4/10/2013 at 12:26 PM, mrd6 said: I'll admit, half way through sanding that fiberglass in the rain and cold while I was all itchy I was definitely starting to question why i was doing this haha Soon To Be '04 Ford Escape US Alternator 280A Hairpin D4800 Under the Hood (6) XP3000's in Rear 1/0 SHCA & XS Power 4 runs to back TORK2 kit from Tony @ CE Auto Supply Pioneer DEH-80PRS DD AW6.5 (2) per door *Tweeter Unkown* DD SS4a & C3d (2) SCV4000 @ .5Ohm (2) 15" Sundown Zv5 Link to comment Share on other sites More sharing options...
Weigel21 Posted June 12, 2014 Report Share Posted June 12, 2014 I haven't seen many RCA cables with shielding ground for some time, do they still exist? I know the Kenwoods I've go t have a separate location for the shield ground. Link to comment Share on other sites More sharing options...
THEKINGsBACK Posted June 12, 2014 Report Share Posted June 12, 2014 What type of surface was it mounted to.... I had a issue with a fosgate amp one time where it didn't like metal contact so I mounted it to a beauty board and never had an issue he wouldnt be the first to say they did a 167 with a system like that (one that clearly DOESNT), but i have to say, he didnt beat me anywhere, ive never competed against the guy. If he thinks his does a 167, mine would probably put him in a coma. :hairtrick: Link to comment Share on other sites More sharing options...
PortSideAudio Posted June 12, 2014 Report Share Posted June 12, 2014 One thing I am thinking of, since some amps require different RCA technology. That you need to ground the RCA's. Are you talking single-ended input vs. differential? bc I personally have only heard of that causing distortion or muddy signals, but it is more then possible it could also create a ground loop, so in that case try using coax RCAs instead of twisted pair and see if it helps 2002 Toyota Corolla Pioneer DEH-80PRS Soundqubed Q1-2200d Soundqubed HDC3.118 Soundqubed Q4-120 Alpine SPR-60 Alpine SPR-60C Link to comment Share on other sites More sharing options...
Weigel21 Posted June 12, 2014 Report Share Posted June 12, 2014 Probably nothing to do with the issue, but how was the gain set on the amplifier? Link to comment Share on other sites More sharing options...
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