[AndyMcGanj]

I have recently done a full audio install, amp deck subs and speakers. It sound amazing but theres a really high pitch hiss coming from 2 of the tweeters, i mounted the tweeters in the vents above the deck. I hav checked all the grounds, none of the speaker wires or RCA are run beside power. And the hiss only happens when the engine is running, anyone have any ideas?

 

[08Canyon]

Is the amp ground wire short as possible, same AWG as the amp power feed and grounded to a solid ground point?

That's all I got. You may choose to provide manufacturer information for others to help. Maybe you have components that aren't of high quality.

Alternator whine is pretty common with with an amp.

 

[AndyMcGanj]

Any way to eliminate or suppress alternator whine?
:salute:

 

[Rick_crew]

Any way to eliminate or suppress alternator whine?
:salute:

Here are some suggestions:
How To - Car Stereo - In Pursuit of a Noise-Free System: The Ten Commandments of Noise Prevention

http://www.carstereo.com/help/Articles.cfm?id=71

 

[AndyMcGanj]

Thanks for the help, very useful list.