"Linesource with one tweeter?

[TroelsM]

Hi all.

Just a quick Q: (yep tried a search): If one (me perhaps) got a very good deal on some (approx 50) 2½" Vifa's what should one (me again, I guess) do?

Without filters I would say that they sound OK and build-quality seems to be fine too. Lets say I went all out and build some "line-source-ish" tall speakers with 4-8 or 16 Vifa's and one dome, what should I expect?

I'm guessing that due to the different "sound-patterns" from a point-source (tweet) and a line-source (lot's o´ Vifas) the sound will be different if one moves away from the sweet-spot?

This would be 8 vifa's (MB = midbass) and one dome (TW):

MB MB MB MB TW MB MB MB MB

IF only the middle Vifa's were used as MB and the rest were used as "bass" (B) that would look like:

B B B B MB TW MB B B B B

The latter is of course not a line-source as such, but would it work? The come-filter-effect (right?) should be smaller if only the middle units work high-freq?

Excuse my ignorance. The Q just popped up somewhere in the brain and had to be asked...

Regards

[MaVo]

more than 1/4 wavelength at crossover frequency distance between the driver centers and you get comb filtering / lobing. thats perhaps a problem with the distance between the tweeter and the woofer with the most distance to it.

more generally spoken, that should be a problem with every line source, so i really dont know why those kind of speakers are used where sound quality matters. i mean, even if every single driver adds coherently with its neighbours, it wont add with every other driver in the line.
with other words: there is a sound runtime difference due to the pathlength difference between the drivers in the middle and the ones at the ends of the line to the listener. that means every transient is smeared over perhaps one or two milliseconds.