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  #1  
Old 09-04-2012, 09:48 PM
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Default Please Help!!!

Okay guys I have had this problem for close to year now and I am about ready to pull my amp out and run off of hu power again I am so fed up... its that serious... lol. I drive a 2003 grand am. I have 0awg big 3. 0awg from front batt to rear batt. My mono amp and highs amp both have independant power wires that run to the rear batt. Both have independant ground wires that run the batt also. And then the batt is grounded to the rear strut tower. All connections are solid... soldered terminals, sanded surfaces to the metal and all...however, I am experiencing what I expect is engine noise coming from my rear speakers. Tone changes with rpm level, blinkers make noise thru the rear speakers as well. My highs amp is a fosgate 400-4. So not top of the line but by no means a cheapie. I have a pioneer premier 4volt hu paired with a soundstream 7band eq and line driver. Let it be known also, noise is only generated thru the rear speakers which are amplified by the 400-4. The front speakers run off hu power and do not generate the noise. I have redid all grounds. Replaced all wires. My power is ran on drivers side. And rcas and remote ran on passenger. Ground loop isolaters have no effect. Does anyone have any idea what else I could try to grt rid of this horrible whining Any help at all would be greatly appretiated.
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Old 09-04-2012, 10:01 PM
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Common issue with pioneer decks do a search on the forum " pico fuse " and you'll find lots of threads about it the easiest way to fix it is to ground your rca's to your head unit chassis
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Old 09-04-2012, 10:03 PM
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but no problem with noise coming threw sub? try grounding ur highs amp independanly to the frame, not to the battery
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HU: Alpine INE-S920HD
SUBSTAGE: DD 9512f's on a CT Sounds 7k, 10" aero
F/R STAGE: Rockford Pro mids and supertweeters Rockford T400-4
ELECTRICAL: JS Ultimate 300a 6 phase, few batteries, welding wire
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Old 09-04-2012, 10:05 PM
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^^^ I agree, I had the same problem when I was using my Pioneer deck. I heard the pico fuse blows from connecting and disconnecting the RCA's while the system is on. Grounding to the headunit helped a lot.
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Old 09-04-2012, 10:05 PM
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At your amp, short from rca shield to the amp gnd. If that fixes your noise pico fuse is the issue. Ideally you want to fuse that wire in case you short b+ to the rca's. Otherwise you risk taking out your hu.
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Old 09-04-2012, 10:05 PM
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I had the same issue with my pioneer only got nosie through the front and rear rcas not the sub output
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Old 09-04-2012, 10:06 PM
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No noise thru sub at all. Also, forgot to mention it cannot be the highs amp because I have had same prob with 4 different amps.
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Old 09-04-2012, 10:08 PM
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Ok. I have heard before people talkin about grounding their rcas. But what (exactly) do I need to do?
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Old 09-04-2012, 10:08 PM
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We never said it was an amp issue its your headunit and to.fix it you need toground your rcas to the metal chassis of the headunit
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Old 09-04-2012, 10:11 PM
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Quote:
Originally Posted by coltwiget View Post
Ok. I have heard before people talkin about grounding their rcas. But what (exactly) do I need to do?
Strip back some small gauge wire. Wrap the wire around the RCA cable ends (against the metal) where they connect to your headunit. Ground the other side of the speaker wire to the headunit itself (use a screw somehwhere on the back of the unit)

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