1986 Volkswagen Vanagon
Crutchfield Customer Review (What's this?)
Bought the FGA to correct an odd wiring design in my Vanagon in which the two rear speakers share a common ground, which made the receiver distort and anything above moderate listening levels. I used this device to put all four speakers and the receiver chassis on the same (chassis) ground, and to my amazement this corrected the problem and allowed the receiver to put out full power without distortion.
Pros: Does what it is supposed to do, when used 'intelligently' (some knowledge of electronics is helpful!).
Cons: Instruction sheet is of little use.