My bandmate uses a Blues DeVille 2x12 combo, and I play a Goodsell Super 17 mk2 1x12 combo. Per its reputation, the DeVille is quite a loud amp, so much so that he's bought one of those one-knob attenuators that goes in the effects loop of the amp so he can open up the volume a little without changing anyone's sperm count. In our small basement practice space, we have our amps in to be at similar perceived volumes, and it works fine. Then we pack up our gear, set up on a stage (particularly outdoors), and the perceived volume of my 17-watt 1x12 is suddenly enormous whether standing in front of or behind it. Meanwhile his 60-watt 2x12 sounds puny from almost every angle except twenty feet away, dead on in front of it. It's uncanny, and consistent. I'm throttling my amp down dramatically (master at 10 o'clock with a Brake Lite on 2 or 3). He's cranking his up. His tone is drowning, mine is raging. What I'm wondering is whether this is just a characteristic of 2x12 combos generally, if it's specific to the Blues DeVille (or its stock speakers), or what. We like the sound of his amp and it presents a good contrast to my sound, so he's reluctant to change anything. I'm curious whether different speakers would help, or whether getting one high-wattage speaker and wiring it up as a 1x12 would make a difference.