hissing noise help(long *** post, bare with me)

[mile098 10+ year member]

ok, pls take the time to read this.

i have developed a hissing sound on my front speakers lately. i say lately because when i installed the amp it wasn't there..its not much, on the majority of the songs i cant hear it, but on some its annoying.

the only thing i changed is up the gain on my front amp speakers, but not enough to clip. now it doesn't matter where the gains are set the hiss increases with the hu's volume.

i've had engine whine problems before and it drove me insane and this isn't it, more like static.

power and ground are 35mm^2(2 awg i think) till the trunk, distributing into 10mm^2(? awg) to the amps. im losing aprox 0.3-4 volts on the cable at full tilt from the bat to the trunk(my dmm is not 100% accurate tho). i reinfocrced the ground from bat to the engine with 35mm^2, the ground in the trunk is taken from the seat belt motor.

and when ever i power up the amps i hear a slight bump on the subs. besides running another 2 awg cable directly from the bat for ground thats the best i coud find. im guessing its bad ground, what do you guys think?

edit: when i turn up the volume on the HU i hear a barely noticable cracking sound, which as far as i know has to be bad ground...

any input is welcome

my equipment is in the sig

Click to read more...

 

[mile098 10+ year member]

bump fpr input, im off for the night..

 

[lostdaytomorrow 10+ year member]

So does it go away if you turn the gain back down for the front amp?

 

[Atimm693 10+ year member]

Redo the HU ground.

 

[JeffM 10+ year member]

I have this trouble too, It will only go away if I turn down the gain. Try turning the gain down and setting it with you HU volume up a few more notches.