Well, a trumpet still needs to be mic'd to play with a loud band, which is about idead gigging volume, IMO.
Anyway, I currently practice with a 45-watt amp with the volume down quite a bit- it still sounds good, but it'd be better if i could push the poweramp a little. Drop from 45 to 6 watts, and I could be playing on 3 or 4 at sane "house" levels, instead of 1.
-D