Yea, great point!! What ever the mfw's didn't do to the structure, 4 of these bad boys will finish off. When I got them I was like its going to take 4-12" to replace 2-15". I was astonishingly mistaken. I had heard the 12's wouldn't pressurize a room, another mistaken idle thought. These things rock!! and the sound is wonderful! Articulate and powerful!! That was with 2 hooked up. 4 is wicked good. Imagine with LS-6"s and Dodd Power!!