I just hooked up the Sony to my BSD. I have to admit it makes a difference and is easily installed / removed. For some reason , when I hooked it up the first time I got no sound at all and was afraid i blew something. Turns out some how I just created an open circuit. Once I put the original speaker back in the circuit ( the alligator clips on the wings of the original speaker connection) it worked great. I will try the Polk next.