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In the Forum: Horn-Loaded Speakers
In the Thread: The best 20 hz bass horn
Post Subject: 416 resonancePosted by Horn Savant on: 8/28/2010
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 Romy the Cat wrote:
. What was your resonant frequency after loading? The 416 are 25Hz drivers, after loading and with two drivers it might be deep in teens. From the picture it looks like you keep the back chamber of extra large space, or even wide open. Did you find in this situation that the cone is a bit “loose?”

The Cat


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.

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