Went out today to rehearse with a new bunch of guys I hooked up with as kind of a side project... Anyway, so this is my second run through with them in a week, and they have a sweet rehearsal setup in a huge, renovated barn out of town where they have a full PA and board and all the gear (and a fridge, and washroom, and foozeball table!) all set up. When they rehearse they mix everyone and everything through the PA and just keep their amps handy as personal monitors, so rather than haul out my whole dang rack again today I decided I'd just grab my pedal board and a little tube amp and run my SM57 into the board (especially since I completely wrecked my back wrestling with air conditioners yesterday!
)... So anyway, I get to the rehearsal space and set up this rig:
my Axis
=>> my pedal board
=>> my Super Champ
This amp weighs all of about 15 lbs, I think...
Anyway, I hooked a clip-on gooseneck to the amp and dropped my SM57 just slightly off dead center on the speaker. Then I engaged the mid-boost, turned up the amp to about 70% and set the reverb to about 2. Sounded pretty good sitting on the ground about five feet away from me, angled up at my ears, but then we kicked it through the PA and WOAH! It sounded huge! Bleeding monsterous!! I got an amazingly heavy, chunky rhythm tone out of my yellow FD2 through this setup, and the silverbox FD2 with the boost engaged gave me a beautiful, singing lead tone. The clean tone was very sweet too! I was - frankly - amazed... I went there thinking that I didn't care if I sounded crap because my back hurt so much, and ended up totoally blown away and inspired by the tones I was getting out of this mini-rig... I may never break my back hauling 80 lb. racks around again! 
my Axis

=>> my pedal board

=>> my Super Champ

This amp weighs all of about 15 lbs, I think...