Okay, if you have an amp that's 250 watts per side, I understand that's 500 "total" watts, but it is really the same as having a 500 watt amp? I'm thinking in terms of real world power and volume, like if you're standing in a room with the thing. Would a 250 watt per side amp be as loud as a 500 watt amp, or only as loud as a 250 watt amp? I understand that cabinets, acoustics, the room, stages of the moon, etc all play a role here, but I'm saying all things being equal...say a stack with one 250w side going into a 4x10 cab, and the other 250w side going into a 1x15 cab versus the same stack with all 500 watts going into both cabs. Please help me to understand!