AC Ground Loop Eliminator

Here is an interesting product that can eliminate ground loops without lifting the electrical ground. http://www.ebtechaudio.com/humxdes.html

Note: this product has a 6 amp capacity limit.

This is another product that can be used in the line from your preamp or receiver to a subwoofer to solve the problem.

DTI Ground Loop Eliminator

W. Jeff Meier

ISF and THX Certified Home Theater Consultant