I just purchased the G50 Wireless for my bass, I'm having problems with a compressed hiss on lower register notes.... when the string isn't played there is no hiss but as soon as you strike a note it is there..... I've tried 2 different amps 3 different basses and have switched between RF1 and RF 2 with no luck. My MTD 535 is noticeable and not as bad, but when I play my Sadowsky with single coils it is completely useless.