I wonder if somebody who knows electronics can explain this surprising discovery. I've got an AMT mic (the kind that comes with the premium pre-amp, I forget the model number). Using it in my GK MB150 combo amp, I've never been able to get more than a whisper from it, with or without additional external pre-amps. It's been sort of the "my bass only no louder" concept. Tried all kinds of different placements, angles, settings, etc. No usable volume. Today on a whim I plugged the AMT into my little practice amp, a Crate B10 that only has 10 watts (compared to the GK's 100-to-150 watts). Presto! It sounded great -- loud enough to actually use on a gig! I also tried it through my Fishman pre-amp into the Crate B10, but I lost some volume that way. I got the loudest, most powerful and roundest sound plugging the AMT directly into the Crate B10. Who'da thunk?