Power hum when running inverter

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=78553
Printed Date: July 13, 2025 at 9:03 PM

Topic: Power hum when running inverter

Posted By: tzed9
Subject: Power hum when running inverter
Date Posted: June 01, 2006 at 1:37 AM

Hi sure this is a simple one for somebody...

Got a cheap inverter to charge the laptop on the dash - Vaio PCG-U3, tiny little thing.

When its on I get power hum coming from the sub. I have tried to move the earths for each away from each other, which helped some, but the hum remains still.

Is there something I can try?

Many thanks!

-------------
More blue lights please!

Replies:

Posted By: aznboi3644
Date Posted: June 01, 2006 at 1:51 AM

instead of earths call them grounds.

Is the inverter wired directly to the battery or is it a cigarette lighter one?

Posted By: tzed9
Date Posted: June 02, 2006 at 9:51 AM

Its had the crappy cigarette lighted adapter chopped off and been wired, via relay and fuse, to the battery. THe live has anyway, ground goes to body. Sub is wired a similar way.

Any thoughts please?

-------------
More blue lights please!

Print Page | Close Window