Question about BSC and super baffles

gnugear · 27th March 2008, 06:28 AM

I've been reading through all the archives and I'm trying to understand exactly what the super baffle does. If I add one to my BIB will it negate the need for a BSC circuit or are they two different things?

Scottmoose · 27th March 2008, 11:33 AM

It doesn't need either if it's correctly positioned in corners (which is what it's designed for).

A supra baffle lowers the step-loss frequency at / below which the acoustical load makes a transition from 2pi to 4pi radiation space. The frequency at which this transition occurs is dependant upon baffle width -the wider, the lower in frequency the step-loss point is.

In plainer English, above this frequency the speaker is projecting sound forward (more-or less), toward the listener, but below, it is radiating in an omni-directional fashion, so there's an apparant reduction in low frequency sound pressure levels at the listening position, as less energy is directed forward, but distributed in other directions.

27th March 2008, 06:28 AM	#1
gnugear diyAudio Member Join Date: Aug 2005	Question about BSC and super baffles I've been reading through all the archives and I'm trying to understand exactly what the super baffle does. If I add one to my BIB will it negate the need for a BSC circuit or are they two different things?

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27th March 2008, 11:33 AM	#2
Scottmoose diyAudio Member Join Date: Mar 2005 Location: UK	It doesn't need either if it's correctly positioned in corners (which is what it's designed for). A supra baffle lowers the step-loss frequency at / below which the acoustical load makes a transition from 2pi to 4pi radiation space. The frequency at which this transition occurs is dependant upon baffle width -the wider, the lower in frequency the step-loss point is. In plainer English, above this frequency the speaker is projecting sound forward (more-or less), toward the listener, but below, it is radiating in an omni-directional fashion, so there's an apparant reduction in low frequency sound pressure levels at the listening position, as less energy is directed forward, but distributed in other directions.

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