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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox’s S2 Survival Guide.
Post Subject: Twin S2s per channel...Posted by cv on: 4/14/2005

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Do you even need a horn to run it at 5kHz? The acoustic transformation's probably done by the time the wave reaches the throat. Or is this more just to shape the rolloff below 5kHz? I once tried a hornless S2 as a tweeter; it was quite lovely but didn't quite go high enough for me.

I'm currently running *one* S2 barbarically, while tweaking a few things. It's x/o'd 1st order before the amp at 500Hz on a 340Hz JMLC horn. Btw, the JM flare has a "T factor" parameter that can be used to control how open the flare is - larger T, shorter horn - you may be able to produce a horn that loads the S2 correctly down to 500Hz without sacrificing top.

Anyway, I need to setup my measurement rig to see exactly what my drivers do because crude measurements indicate that they are all over the shop, sensitivity and response wise. Then I can match a pair up and see how they really perform.

Not that any of this will help you, my reference points are crude, my source neanderthal and the amplfication chain fit only for troglodytes... but I'm working on it...

What you really need Romy is to find someone who will build 2 scale models of the S2; one twice the size for midbass and one half the size with electropolished phasing slits for tweeter duty, stick the standard S2 in the middle and you're done...

cheers

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