Here is my setup :

Eclipse 1200 HU
JBL 75.4 amp
infinity reference component

when my HU doesn't play any song i can hear clearly the hiss noise, anyone know what is the cause of it? poor grounding? hiss from HU? poor RCA cable?

hissing sound can mean a few things

1. amp gain too high - for normal guideline, ur HU should hv 80% volume on and start amp gain from minimum

2. amp/HU might hv problem

ways to test
1. lower down ur amp gain and see does it solve

2. recheck ur power cabling, rca and spkr cables....

by the way, are u bridging ur 4 channel?

normally is RCA problems la.. rca and cabling issues.. get better cables and try.. my fren last time having the same problem also.. after change to better cables, everythings solved..

normally its the gain problem. turn it down and ur good.

Tats all the answer the TS need..~ its all here..~

bridging means ? mine is 4 channels and 2 channels connect to front component and another 2 channel used to fire 10" amp.

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Added on September 25, 2008, 11:10 amreally ? i guess so too because from a foreign site somebody mentioned this also. btw i plan to upgrade it to better rca cable, which one better? are those diy from garage sales good ?

This post has been edited by erictioh: Sep 25 2008, 11:10 AM