Originally Posted by zero the hero
ah... mtm. So, in addition to the horizontal off-axis issues of a 4" mid crossed at 5600,
No, you don't get to assume that. You're asserting it, so now you need to prove your assertion. Let me help you out, now, what is the radiating diameter of a 4" driver of this sort. That, of course, for starters.
we've introduced massive vertical lobing due to center to center spacing of the mids being considerably longer than the wavelength of the crossover point, (unless somehow you've managed the neat trick of placing 2 4" drivers less than 2 1/2 inches apart center to center with a tweeter in the middle
It's quite interesting to watch the intellectual games you try to play here. First you presume that the size of the 4" speaker radiating area is 4", and then here you play with the idea that the 4" speaker is a point source.
One reading your words is forced to assume that you use whatever kind of assumption you need in order to justify your ill-considered objections, I guess.
Hint: The drivers are not point sources.
And, no, you may not assume lobing. You were objecting to the idea of a crossover a while ago, remember? Did you forget the effects that has in terms of radiating pattern and lobing?
Is there some reason you forgot the contributions of the thing you objected to first? Is it possible you're leaving a few minor technical details out?
Finally, let's consider what really happens at the crossover point, shall we? We have two radiators about 2.75" in diameter, spaced about 1.6" from a vertically oriented line source in the tweeter.
Oh, hey, you forgot, that looks a lot more like a line radiator even with some delay to the outer elements! Holy cow, it reads almost like somebody designed it that way. Could you ever IMAGINE? :gasp:
Whoops, I guess you missed that part.
Regretfully, I'm not aware of the woofer-mid issue that you speak of... what am I missing?
Quite a bit, I guess. What do you think the effective radiating area and position of the 10" woofer is at 600Hz?
Finally, for extra credit, what do you think the horizontal pattern of this thing looks like above 300Hz?