More on the MAS109... I auditioned with a band last night. Turns out these cats like to play LOUD (too loud, IMO, for rehearsal purposes, but whatever). Great players, which made it worthwhile. That plus etymotics

Hard hitting drummer, loud guitarist with a 100 watt Mesa and 412 cab...
That little 1 10 cab totally kept up, providing thunderous full lows, sounded great. Wow.
I remember a time (long, long ago, when dinosaurs and 410's ruled the earth) when I would avoid notes below the low D on my 5'ers because they just didn't have the same presence and fullness that other notes had... No more! And all this with one bitty 10" speaker (yeah, plus a mid... ).
Wow. And wow again.