[Sam Kapasi]

Originally Posted by Vivekphadnis

I tried with the RCAs removed at the amp end. The hiss is still there.

I tried changing the gain settings. There is very little difference in the amount of hiss.

When I play a CD, I can hear the transport noises from the speakers when the volume is zero. The amp seems to be "faithfully" amplifying and reproducing every bloody kind of signal/noise. I suppose the hiss was there even without the amp and it is being amplified now.

My guess would be that the wires are picking up some noise. The speaker and RCA wires are running parallel to the Autocop security system wiring. Just below the steering wheel, the autocop thing is fitted and the RCAs run near it. Obviously, there is a power wire for the autocop. There could be something there.

Vivek, if the hiss is still present, even with the RCAs REMOVED from the amplifier end, it simply cannot be the fault of the wire. That is simple logic.

Turn down the gain of the amp. If you can hear the CD transport from your amplifier, obviously the muting circuit on your HU isnt doing it's job.
Turn down the gain. I do not think the autocop has anything to do with it.

[Vivekphadnis]

Agreed that it cannot be the wire's fault if it is not connected at the amp end. What happens if I use the amp with the gain fully turned down?

[navin]

vivek, i just checked and the gains on all my amps are around the 9 o clock position. my HU has enough to drive those amps to full volume even with the gain turned almost fully down. so i would start with gains in the 9 o clock position and then work from there.

[Sam Kapasi]

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