hey ricci, thanks for keeping an eye on this one.
with respect to frequency response, i was thinking that +/- 1.5db (excluding the two notches) was "good enough". as you know, hornresp really makes things look choppy.
as for size, that is kind of an end user call. bigger is better, until it is too big for the user. his buddy gave the green light for an absolute monster 5x6x2 footer, but even i thought that was a little ridiculous. the current one is 4x5x2. still quite big, but the driver seems happy in it. do you think i should knock it down some more?
the compression ratio is just under 2.5:1.0. i don't want to push it more than that. on the off chance that a higher ratio would tear the driver apart, i would feel terrible and again the frequency response is pretty darn good as is.