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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s Midbass Project – the grown up time.
Post Subject: It is true, but….Posted by Romy the Cat on: 7/18/2010
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 jessie.dazzle wrote:
For your rear chambers, as they will be adjustable, it would be smart to go with a max volume that is larger than the max you estimate to be necessary.

The size of rear chamber is something that dials in the composite resonance frequency of driver and enclosure. I know at this point will be my horn rate – 43.5Hz and it means that my target Fs will be somewhere around that.  Usually the diver placed in this type enclosure will rise resonance frequency, so in order all this to work properly the driver that I will be using need to have own free air resonance around 30-35Hz. I am a bit afraid the my Vitavox 150-inchers will not have such a lot resonance. The Altec 515G have resonance around 37-40Hz. If I use such a driver in my 43.5Hz horn then the driver will be severally under-performing or I would be forced to use a huge back chamber or not to use a back chamber at all.

What I need to do is to measure what resonance my Vitavox bass drivers have in free air. Jessie, do you use Vitavox bass drivers, if you do, then did you measure the Vitavox resonance in open air and in your bass horns?

The Cat

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