My thanks to all who responded. Turns out the crossover/amp got replaced by a 50W amp that's dead. Adding another item to the fixit list. Tony ****************************************************** Tony Lum Fremont, California U.S.A Audi Owner/Operator/Mechanic by Necessity ;-) 1987 5000S Turbo Quattro 1985 4000CS Quattro 1980 5000S Sedan ******************************************************