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<blockquote data-quote="helotaxi" data-source="post: 391189" data-attributes="member: 550915">It started basically when you put in the new amp?&nbsp; Disconnect the remote wire from that amp to see if that amp is radiating some noise.&nbsp; Also reground everything using its own wire to the same point on the chassis.&nbsp; Don&#039;t daisy-chain your grounds.&nbsp; Basically just stack all the ring terminals under one bolt.&nbsp; I don&#039;t know if you did this, but upgrade the engine block ground as well, it is the ground for the alt and could be a weak link in the chain.Once you&#039;ve done all that, if the noise is still there, unplug the RCA&#039;s from the amp.&nbsp; If the noise is still present, it is not a signal problem it is a problem with one of the amps.&nbsp; If it is not present, try running a straight shot RCA from the HU to the amp.&nbsp; If you still have noise, it is likely coming from the HU itself.&nbsp; You might be picking up radiated spark noise on the HU power feed.&nbsp; Pull the HU out of the dash and patch it into the power for the amps.&nbsp; With the power supply relocated, the noise should hopefully be gone.&nbsp; If it is, then rewire a direct feed for the HU from the battery rather than using the factory wiring.&nbsp; Use a relay for the IGN wire to turn it on and off but isolate it from the noisy wiring.&nbsp; If it is not gone, try another HU.</blockquote>

[QUOTE="helotaxi, post: 391189, member: 550915"] It started basically when you put in the new amp? Disconnect the remote wire from that amp to see if that amp is radiating some noise. Also reground everything using its own wire to the same point on the chassis. Don't daisy-chain your grounds. Basically just stack all the ring terminals under one bolt. I don't know if you did this, but upgrade the engine block ground as well, it is the ground for the alt and could be a weak link in the chain. Once you've done all that, if the noise is still there, unplug the RCA's from the amp. If the noise is still present, it is not a signal problem it is a problem with one of the amps. If it is not present, try running a straight shot RCA from the HU to the amp. If you still have noise, it is likely coming from the HU itself. You might be picking up radiated spark noise on the HU power feed. Pull the HU out of the dash and patch it into the power for the amps. With the power supply relocated, the noise should hopefully be gone. If it is, then rewire a direct feed for the HU from the battery rather than using the factory wiring. Use a relay for the IGN wire to turn it on and off but isolate it from the noisy wiring. If it is not gone, try another HU. [/QUOTE]

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