Okay so I have a couple related questions about cabs.
1) Let's say you have the same exact amp cranked up all the way, and your cabs all have the exact same speakers. Will it be louder into a 2x12 or 4x12 than a 1x12? Are more speakers inherently more efficient at converting electrical power to sound pressure?
2) Conversely, for low volume bedroom playing, is it always better to stick to smaller 1x cabinet configurations, or can you still get better equal-volume tone out of 2x/4x?
3) Do 2x/4x cabinets have benefits other than sheer output volume, assuming a completely mono signal? Obviously the box is bigger, but how important are the interactions between drivers? (How do passive drivers factor into it?) Is the soundstage a lot bigger?