I have upgraded my system to include MB Quart coaxils, JL 10" subwoofer, and 2 Percision Power amps. I have tried to eliminate this annoying hiss sound by adjusting the gain controls, and the crossover settings, but can't get rid of it completely. Do in need to adjust the in line converter setings? Get a new head unit? Any ideas??

 

i cant say for sure what the source of the problem is but you could try to turn up the gain from the line convertor and keep the amp and crossover gains as low as possible. but keep in mind that when you re-amplify the signal of a speaker output as is the case when you use the stock head unit there will always be some hiss.

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formerly 98 prelude type SH

Currently 2001 Acura 3.2 TL With Navigation Black/Ebony