I've been searching for days and I haven't found much. I'm trying to differentiate between sealed and ported cabs. Is this correct: Sealed needs more drivers for more volume. Ported needs less drivers due to the port designs. It seems that I'm seeing less sealed 810's on stage and more ported 412's, ported 610's and those fearful designs that have multiple size drivers. For example: The ampeg 610 vs 810 (tuning totally aside, that's irrelevant to me for what I want to understand) can put out the similar volume but the 810 needs the extra drivers due to it being a sealed design? I'm really trying to understand, if anyone could put it in laymans terms for me.