I've had this cabinet at rehearsal with my quiet rootsy folksy band for a few months and just love the full range sound at low volumes. Last night I had it out in a big room with a much louder band. When I turned it up it definitely started to sound a little blatty and less controlled. It was shaking the walls, but seemed a little loose if that makes any sense. I heard that there is no stuffing in these acoustic suspension (sealed) cabinets. Being an engineer I had to see for my self. So I took off the grill and popped out one of the speakers. It was in there pretty tight with some kind of a sealing compound, so I had to use a plastic spatula to pry it out. I take this as a good sign because sealed cabinets are supposed to be....well...sealed. I was surprised at just how nice the speaker looked (see photo). It looks quite a bit like an Eminence deltalite. the internal construction looks solid, definitely ply wood, 7/8" front baffle and 1/2" braces inside. The braces run front to back and kind of divide the cabinet into 4 sub boxes (one for each speaker). All of them are open in the middle. I ordered 3 lbs of acousta-stuff to stuff the cabinet. I also bought a set of 3/4" tall rubber feet so I can set this on top of my other cabinet (Schroeder 1515L). The GK and the Schroeder sound great together but the corners don't line up at all. I was thinking about side handles, but the strap on top is all I really need. I'll let you know how it sounds with the stuffing. It should tighten up the bass a lot.