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Multi-Way Conventional loudspeakers with crossovers

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Old 30th May 2013, 10:15 AM   #21
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by tinitus View Post
why BR ?

I would suggest acoustic valve(apperiodic), if you want your top/mid 'vented'
BR = bass reflex
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Old 30th May 2013, 10:17 AM   #22
merlin el mago is offline merlin el mago
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Quote:
Originally Posted by tinitus View Post
why BR ?

I would suggest acoustic valve(apperiodic), if you want your top/mid 'vented'
Sorry my ignorance what's acoustic valve(apperiodic)?
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Old 30th May 2013, 10:19 AM   #23
tinitus is offline tinitus  Europe
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Help for 3 or 4 way loudspeaker
yes I know BR is ported

but it will only cause phase problems
no need when going 3way

Quote:
Originally Posted by merlin el mago View Post
Sorry my ignorance what's acoustic valve(apperiodic)?
acoustic 'resistance'
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Old 30th May 2013, 10:23 AM   #24
merlin el mago is offline merlin el mago
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passive radiator?
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Old 30th May 2013, 10:25 AM   #25
tinitus is offline tinitus  Europe
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Help for 3 or 4 way loudspeaker
no
passive radiator acts more like ported
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Old 30th May 2013, 10:26 AM   #26
Charles Darwin is offline Charles Darwin  United Kingdom
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More like this:

Aperiodic Loudspeaker Enclosure Design
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Old 30th May 2013, 10:27 AM   #27
tinitus is offline tinitus  Europe
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Help for 3 or 4 way loudspeaker
you might think of it like.... 'controlled leak'

thanks Charles
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Old 30th May 2013, 10:29 AM   #28
merlin el mago is offline merlin el mago
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Thanks guys, how to calculate the diameter of hole?
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Old 30th May 2013, 10:52 AM   #29
Charles Darwin is offline Charles Darwin  United Kingdom
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Never built an aperiodic enclosure but the vents come in a certain size and according to some guidelines you use one or more of the same size.

Back in the '80s Dynaudio was one maker of aperiodic boxes (at the time they were still selling drivers to us diy'ers including the vents) and their larger speakers had 3 or 4 of those vents. How to actually make the correct decision on vent number I sadly do not know. Sorry!
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Old 30th May 2013, 11:03 AM   #30
merlin el mago is offline merlin el mago
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Thanks anyway Charles.
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