Hissing and hum from stereo

[Wkwlb]

This morning I suddenly noticed a hissing/electric current sound from my 135 speakers, it will emerge if I hit 1k rpm and disappear when dipping below.

I tried radio, cd and aux or even switched off the stereo, neither helped.

Anyone has experienced this before? It sounds like some grounding issue with the amp/speaker and the generator is messing with it. Is it easily solvable? my car is beyond warranty and this noise is driving me crazy

[weeeee]

Originally Posted by Wkwlb

This morning I suddenly noticed a hissing/electric current sound from my 135 speakers, it will emerge if I hit 1k rpm and disappear when dipping below.

I tried radio, cd and aux or even switched off the stereo, neither helped.

Anyone has experienced this before? It sounds like some grounding issue with the amp/speaker and the generator is messing with it. Is it easily solvable? my car is beyond warranty and this noise is driving me crazy

I have this same issue, and am under warranty. Hopefully I'll post an update after I contact the dealer within the week.

[weeeee]

The issue turned out to be a vacuum line which controls the exhaust flapper (something I had not modified).