I've been thinking about this sound power dip. If I recall correctly, our heads introduce something of a power dip when listening to stereo speakers that occurs around the 2 kHz region, which differentiates our perception of the spectral balance of a phantom center image from an actual center speaker. If that's the case, is it better to make a speaker that accentuates a dip we may be used to (kii 3) or one that has a dip somewhere else (8c)?I think we need to start looking at vertical directivity more. I mean these speakers are for all intents and purposes identically smooth in response, albeit one slightly wider horizontal radiation pattern that the other, but the main difference I can see is the mid to tweeter XO point, the kii at 2khz and the DD8C at 1500(?)hz. This causes a dip in sound power and this would be the main difference one would hear "around the midrange"
Might also explain why the well measured R3's don't wow people as much as the measurements would suggest. The more I measure conventional 2-way 2 driver speakers the more I find myself enjoying the LR4 xo's above 2khz and I seem to loose intelligibility and focus with 2 ways that are LR4 crossed below 2khz. The horizontal measures are perfect, so I can only speculate on the vertical dispersion. I had R3's but sold them on, I found them too forward around that upper mid region no matter what I did.