Engine whine only when plug in sub's RCA..? - Car Audio Classifieds!
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Old 06-19-2010, 06:06 PM
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Default Engine whine only when plug in sub's RCA..?

Pioneer HU, Got a 4 ch amp running comps on 1+2 ch and 2 12's bridged on 3+4 ch,with 2 sets of rcas.

I get engine noise when I plug the rca going to ch 3&4.

I switched the rca from 1&2 with 3&4 to see if rcas was the culprit but still had noise from ch 3&4.
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Old 06-19-2010, 06:07 PM
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ground ur rcas
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Old 06-19-2010, 06:11 PM
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pioneers are notorious for that. either replace the pico fuse or ground the rcas to the cage of the HU
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Old 06-19-2010, 06:44 PM
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Forgot to mention that, I have the rca's grounded.
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Old 06-19-2010, 07:24 PM
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But did you replace / fix the pico fuse.?
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Old 06-19-2010, 07:26 PM
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if it was the pico fuse gounding the rcas would fix that i believe. did you check grounds for HU and amps?
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Old 06-19-2010, 07:31 PM
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Quote:
Originally Posted by harobikes333 View Post
But did you replace / fix the pico fuse.?
not yet.

Quote:
Originally Posted by cl1ckclack View Post
if it was the pico fuse gounding the rcas would fix that i believe. did you check grounds for HU and amps?
Yes, I just dont understand why i only get noise on ch 3 &4,which is the subs. I can hear the whine through my comps.?
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Old 06-19-2010, 07:34 PM
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do you have any signal processors in line before the amps?
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Old 06-19-2010, 07:54 PM
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no sir
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Old 06-19-2010, 07:55 PM
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are you using a 4channel by any chance? i have a pioneer and i had supe rbad ground noise i grounded the rcas, and it was still there so i had to ground teh rca'son the amp too. to completely make it go away
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