Ground Loop Isolator

I don't think there is anything wrong this this product. It just did not work in my situation. My son (also the installer of my car audio system) thinks he might have a grounding problem. The alternator whine is not noticeable at highway speeds(low RPM when cruising) and it can not be heard when I crank up the volume. I did install 3 of these items (L&R front, L&R rear, and sub(only used L on the sub.

For price, is heavier and larger than expected. Well sealed, not bad looking if left in open area; and foremost, cleaned the audio signal in my home theater system _way_ better than hoped. Eliminated 60hz hum, but also prior ambient circuit noise. Sound quality remains great.

This product definately works and really stops the humming noise in any home stereo amplifier theater systems.