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In the Forum: Horn-Loaded Speakers
In the Thread: The best 20 hz bass horn
Post Subject: Same as free-air resonance?Posted by Romy the Cat on: 8/28/2010
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 Horn Savant wrote:

I think it's about the same as free-air resonance - backwave to entire basement. Precedent: pre-war theatre horns
(open rear like Shearer/ERPI)(unlike post-war reflex tuned designs like Altec A4)(I don't like reflex boxes - did not like
416 in Altec 620 box)
that live with resonant amplitude rise. Cone control seems reasonable within moderate power limits. Modern movie/TV
mixing has some massive deep low bass which could damage some drivers without subsonic hi-pass filter.

Actually it is incorrect. If back of your 416 drivers are in free-air and you have 20Hz exponential ¼ size then those drivers have sub 10Hz resonance and you are losing some bass at 20Hz. I do not know what kind horn you have and I do not particularly believe in 20Hz hors but if you would like you can drive the resonance of your drivers up and I think you shall get a lot benefits.

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