Re: How Much Snake Oil Here?

In article <gqapda$d5m$1@xxxxxxxxxxxxxxxx>, kludge@xxxxxxxxx (Scott Dorsey) wrote:
Glenn Dowdy <glenn.no.dowdy@xxxxxxxxxxx> wrote:
http://www.cepro.com/article/atlantic_technology_adds_3_netstreams_enabled_spe
akers/


There's a lot of stuff going on here. First of all, there is the whole
notion of mounting a speaker on a wall boundary, which has some good points
and bad points but mostly bad ones where low end control is concerned.

Secondly there is the notion of using a dsp crossover, which is a reasonable
idea and a lot of active speakers are now doing that although they may not
advertise it. Meyer was doing it more than a decade ago.

Thirdly is the notion of beam-forming to change the speaker pattern. This
really isn't useful at _all_ with this speaker since there's only one
tweeter.... all you can do is steer the midrange and bass, you can't control
the high frequencies which is really most of what you care about controlling
anyway. In general, speakers have lousy patterns. Speakers on boundaries
tend to have even lousier patterns. "Vector control" steering will tend to
change the pattern but not improve it.

THere has been much talk about directionality at lower frequencies,
but mostly right at the crossover point. When J DiAppolito first
started making his first MTM array, the idea was to get
better vertical dispersion near the mid-tweeter crossover
points, and as much dispersion from the remaining set.
He changed all the when his new sets were phased so
there was a narrow vertical dispersion at the crossover point.
This was specifically done to help cut down on wall reflections.


greg

.

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