986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Sound coming from speakers with radio off

thstone · 12-08-2011, 09:07 PM

An intermittant noise proportional to the RPM of the engine implies a possible shorted wire making intermittant contact with the chassis creating a ground loop which couples to the alternator.

This page might be helpful: How To - Car Stereo - In Pursuit of a Noise-Free System: The Ten Commandments of Noise Prevention

12-08-2011, 09:07 PM	#4
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	An intermittant noise proportional to the RPM of the engine implies a possible shorted wire making intermittant contact with the chassis creating a ground loop which couples to the alternator. This page might be helpful: How To - Car Stereo - In Pursuit of a Noise-Free System: The Ten Commandments of Noise Prevention __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor