Will a Universal Factory Sound System Interface help?

[Kevzaz 10+ year member]

I installed a new headunit in my car which already had a 'premium' system. I've been hearing a lot of hissing from my speakers as the volume gets turned up and I am 95% sure its not the ground. And I can't change the gain in the amp, so I think this will help. Will it?

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[x1le 10+ year member]

What kind of car? And why are you so sure it's not the ground?

 

[Kevzaz 10+ year member]

What kind of car? And why are you so sure it's not the ground?

2005 Pontiac Vibe with moon and tunes. And because my friend who knows a lot about electronics checked it out and tried something where he grounded the wires to a couple different places and it didn't make a difference.

 

[bigaudiofanatic 10+ year member]

What kind of head unit? Did you bypass the factory amp when you installed the new head unit or did you use a factory integration harness?

 

[Kevzaz 10+ year member]

What kind of head unit? Did you bypass the factory amp when you installed the new head unit or did you use a factory integration harness?

Pioneer, I forgot model and stuff, but I can check later. And I just used the harness that crutchfield sent me. I am 99% sure its still going to the amp.

 

[Kevzaz 10+ year member]

Bump