|Multi-Way Conventional loudspeakers with crossovers|
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|17th November 2002, 12:40 PM||#11|
Join Date: Oct 2002
Location: Spain or the pueblo of Los Angeles
As to 4 pole slopes
The fact that the driver resonant frequency(on the low end) or high frequency rolloff (and directionality changes) are often less than a octave from the crossover frequency greatly contributes to the actual slope. The driver response is very much a part of the total acoustic response of the filter. To sum it up, you usally wind up with total response slope greater than that of the active filter contribution.
This get's even more convoluted since a 4th order slope is chosen to get even closer to the point where the drivers out of band response starts to fall off. You can wind up with something closer to a sixth order response. Mr. Dickason's loudspeaker books outline this fact very well.
Mr. Pass has given the world the first product to allow one to really exploit this design aproach and the manual for this product is required reading for DIY active crossovers.
XVR1 Owner's Manual
Loudspeaker Design Cookbook
Thanks again to Nelson for shining a bright light in another dark corner.
P.S. further reading:
|17th November 2002, 01:23 PM||#12|
Join Date: Jun 2001
Location: Eugene, OR
And don't forget:
provides an excellent solution.
|17th November 2002, 05:42 PM||#13|
Join Date: Oct 2001
Location: Victoria, BC, NA, Sol III
Blog Entries: 5
and some tube designs
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