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A staggered horn.
A staggered horn.
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Old 9th August 2019, 05:41 AM   #11
GM is offline GM  United States
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Not an acoustic term, but works for describing how this particular one looks.

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Old 9th August 2019, 06:05 AM   #12
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Quote:
Originally Posted by Scottmoose View Post
Using two differently tuned horns may average out deviations e.g. harmonic modes.
Well, if he did it acoustically like the divided 12" concrete former tube I posted about on the original FR forum and one other [here?] is tuned to Fs and the other is tuned to fill in the dip ~ a half octave above it [~1.4142x Fs], so functions acoustically similar to a double bass reflex [DBR] to increase power handling all the way down to tuning [Fb].

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Old 9th August 2019, 08:47 AM   #13
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Ah. Obviously not one of my brighter moments (re the appearance).

I suspect it'll be tuned more or less in that way.

Re the question about Japanese design practice with wideband drive units, not without writing something approaching book length and I don't profess to be an expert on it (or anything else for that matter). Short version, for a variety of reasons there is somewhat less concern with a flat (or even a particular target) frequency / amplitude response. Likewise, even enclosure resonance modes per se are not automatically viewed as a great evil providing they don't significantly impinge on, say, pitch, or help provide a desired tone. Certain resonant softwoods are prized in some circles for that reason.

There is also a much wider attention given to system design as a whole than is often applied in the west. Drivers are often designed assuming a particular broad type of amplifier or in the absense of said, that appropriate alternate means are applied to achieve similiar. Compact enclosures tuned very low, but without necessarily having large amounts of gain (except, in some cases, a bit of a kick around Fb / Fp) are often popular, because many are used in small, thin-wall apartments. Narrow baffles are also popular -partly reducing edge diffraction, but mainly so the damn things can fit into a small space with the least practical intrusion. Extreme example: take 1 x 3in Fostex drive unit and end-load a compact 12ft long horn with it for mini HT. Tall is often seen as good for the same reason: it doesn't eat into floorspace. T/S filter theory is not used to quite the extent it is elsewhere; some aspects but it lacks the near-blanket dominance it has in other regions. And so on.
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