Hi all.got one question.my speaker got hissing sound after turning on engine.
I can reduce the hissing to lower or none by lowering gain at amp.
Question is, will i loose quality?

grounding (electrical supply not clean?) or too high amp gain.

give it a try on lowering your amp gain

and no, amp gain != quality.

That's good... I lowered gain and no guessing sound. Already tried restructure wires... After lower gain i cant set too high volume

Gain will affect sq...too high or too low will make it sound bad...

how's so? Can you please guide me and how is the best gain setting? Thanks . ..

to get best setting you have to establish the highest point without distortion and the lowest point on the gain knob... using a o-scope

then you can start to do your tuning from there...

This post has been edited by craziechild: Feb 3 2013, 11:59 PM

what u mean by 0-scope

did u check your crossover box too near to other electrical wires ?
happened in my car, i just moved the box further away and the hiss sound is gone

I didn't have the crossover box. Moved the one to two fuse box already already...

Tumpang this post ..... Any one faced loud hissing sound at the lowest point of the gain ? Then when you gradually increase the gain the hissing sound faded at the middle of the gain .... Then when after the mid section of the gain the hissing sound comes back

Have you tried fixing noise supressor?

Does noise supressor really work ? The packaging never really convince me .... Wil try will try

waste of money

Quazacolt .... Any idea ?

solve the cause of the problem. bring back to your original installer or find one that can help

The hissing you get from the tweeters is noise.
This noise is picked up by the RCA and further amplified at the amp, made worse by the higher than required amp input gain. To solve your problem, you have to source a HU with high preout voltage, enabling you to reduce your amp gain to eliminate your noise problem.