been thinking about selling the whole setup.....GPR-90/GSB-1 and a 200V with it....I have a 100V/600L I like better with a R-390A/CV-591A setup......Guess you like the audio from the GSB over the CV units? I just can't get used to it....Paid big bucks for the darn thing too.....Can't test drive a BA before you buy... The GSB filtering is just to narrow for my taste I guess......paul