I'm working on several cab designs, but I can't decide which I should do. I do know that the cab MUST have at least one 12 in it, with at least another 12, a 10, or an 8. Basically, I'm trying to make a compact cab that can handle a lot of power and provides both low end and punch. I've already got a spare grill that will fit a cab measuring 24" x 15", so I'd like to use it, if I can. So far, I'm torn between two main designs: The first is what I've dubbed the "1208." It's a 12 paired with an 8 and tweeter. I figured this way, I'd have the low end of the 12 with the punch and speed of the 8. I'm just affraid that the single 12 wont give me enough low, though. I can make it as small as 24" x 15" x 12", so it will fit the grill I have. (See image.) The second is your typical 212. The problem with the 212 is that it's a bit boxy and bigger than I would like. I'd like to do this one because it's a tried and true design, but the smallest I can get it is 24" x 24" x 12" which means it won't fit the grill I have already. I suppose I COULD do the 212 like Schroeder (straight 12 / angled 12), but I'm not a fan of the angled driver design. On the upside, it WOULD fit the grill. I've thought about doing an isobaric design, but I'm not at all familiar with the physics involved there, so I've ruled that out as an option. At the very least, I could take the 112 studio monitors I've got and replace the existing drivers with new, high power 12s. These monitors have been in the family for AT LEAST 15 years, though, and according to my dad, they still sound as good as the day he got them, so I'd rather not modify them.