I olso used few times the RE-20 and olso in the Radio. I didn't heard it becouse just used to the front. My guitar player checked from outside, he told the sound was very good. I like to use mic stads, so I dont go for Clamp, I like to keep my bass clear of clamps, rubbers., tu mutch cables, Bass Bibs, bow holders. I know this is a total insanity and not practical but maybe comes from my classical past. A small clip on mic will be olso practical and look nice but I had no succes with very small mics. Maybe the small diaphragm is not enough to capture a big instrument like URB, i dint know. I like If the mic was not heavy and big as the Re 20 and sounds good. The Sennheiser MD 421 is olso very good, but in this thread I'm curious in cheaper mics.