hisssssssssssing

**Posted:** Sat Apr 23, 2011 9:37 pm

just started a boot install using a fusion amp and a fusion 9" sub got it fitted up but have a hissing noise from the sub any ideas

**Posted:** Sun Apr 24, 2011 12:29 pm

Short circuit somewhere? Try a line filter?

**Posted:** Sun Apr 24, 2011 1:18 pm

iv got a line filter, I get the hiss when the engine is not running

**Posted:** Sun Apr 24, 2011 2:06 pm

In that case, try disconnecting the sub's amp from the head unit. Do it first at the amp end, if that cures it, plug the RCA cables back in and then disconnect it from the head unit end.

If it hisses with the cables plugged into the amp but not into the head unit, interference is either being picked up along the cable or the cable has a problem. If it only does it when plugged into the head unit, it could be that the head is faulty. See then if you can try another head unit :thumbleft:

Hope that helps

**Posted:** Sun Apr 24, 2011 6:07 pm

will have a go at that tomorrow thanks

hisssssssssssing

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