Port inside of the waveguide

mashaffer · 15th June 2006, 02:19 AM

Just another crazy thought. On Ported systems with bass waveguide ala Altec VOT the ports were on the front of the box below the wave guide. Is there any particular reason why the ports were not/could not be next to the driver in the throat of the WG?

mike

zobsky · 15th June 2006, 02:36 AM

possible comb filtering/ intereference , ....
also possible benefits in loading both sides of the cone , ...eg. the karlson enclosure

cyclotronguy · 15th June 2006, 05:57 PM

I've actually tried that on a JBL 4560 clone, which is the JBL answer to the Altec A-7 (and in some regards an improvement on the Altec)

Didn't do much of anything that I could see on MLSSA (nearfield in freespace). I took that to indicate the horn flare was just too small.

Cyclotronguy.

15th June 2006, 02:19 AM	#1
mashaffer diyAudio Member Join Date: Jun 2004 Location: Indiana	Port inside of the waveguide Just another crazy thought. On Ported systems with bass waveguide ala Altec VOT the ports were on the front of the box below the wave guide. Is there any particular reason why the ports were not/could not be next to the driver in the throat of the WG? mike

15th June 2006, 02:36 AM	#2
zobsky diyAudio Member Join Date: Mar 2002 Location: Dallas, Tx, USA	possible comb filtering/ intereference , .... also possible benefits in loading both sides of the cone , ...eg. the karlson enclosure __________________ "Any fool can know. The point is to understand" - Albert Einstein

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15th June 2006, 05:57 PM	#3
cyclotronguy diyAudio Member Join Date: Sep 2001 Location: Northern California	I've actually tried that on a JBL 4560 clone, which is the JBL answer to the Altec A-7 (and in some regards an improvement on the Altec) Didn't do much of anything that I could see on MLSSA (nearfield in freespace). I took that to indicate the horn flare was just too small. Cyclotronguy.

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