Posted by Larry Acklin [ 162.33.84.88 ] on November 08, 2004 at 10:59:54:
In Reply to: Re: 12π and 15π horn loudspeakers posted by Wayne Parham on November 07, 2004 at 19:47:53:
Hi Wayne et all:
Been following this one with great interest, since i've been using folded horn subs for PA for a while. Wayne, look at www.stage-accompany.com and look how they have employed forced air cooling into the performer series. ("Air system").
Basic form is a fan, and a speed controller that reacts to averages of progam levels- then adjusts speed of the fan to the conditions.
Also remember that most PA subs are not being used at below 40-45 hz.
Nothing down there, too much potential for sstage rumble, or runaway subsonic feedback, etc. Some systems don't operate below 60 hz.
Larry Acklin
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