Thanks Widget, I'll wade through the mass. As for the 2421, I stand corrected. I own both types myself. At the risk of going OT, I believe the benefit is extended HF response, and the cost power compression. How would they differ if the actual working bandwidth doesn't take advantage of that extended range?. Hell, I've heard phenolic diaphragmed drivers sound smoother when used in a narrow 800hz-6.5/7khz bandwidth, I know, 6.5khz is pushing it, but you get my drift. As for E.Q., I thought that that was a no-no around here, for the most part.