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72.36.1.26
In Reply to: RE: What the... posted by Tom Brennan on March 23, 2021 at 19:52:58
The main difference AFAIK is that "waveguides" usually do not increase efficiency much (if at all). But if/when a waveguide does increase efficiency, it is only going to be at the lower end of the frequency spectrum...
Correct me if I'm wrong, of course.
Follow Ups:
All horns are wave guides. Not all wave guides are horns. In order to have gain a horn throat must be less than a wavelength in dimension. You very much can have a horn that gives gain in the low end but not the high end, for that reason. A true wave guide has no gain, as the throat is too big for loading. But the main difference between a wave guide and a horn from a real world standpoint is what you call it, and why. Horns have an undeserved reputation for having a honking tone, making them a difficult sell to those who listen with their eyes rather than their ears. Calling horns wave guides is how the marketeers get around using the dreaded 'H' word.
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Well said, Bill.
Thanks. Here's an example of wave guide marketeering, the Dayton H6512:
https://www.parts-express.com/Dayton-Audio-H6512-6-1-2-x-12-Waveguide-1-3-8-18-TPI-270-318
Its description says 'A waveguide couples the high frequency driver to the listening space without the harmful distortion artifacts of marginally designed and implemented horn loading. It achieves this through the use of non-traditional geometries and lower expansion rates. The resultant sound has less distortion, with an "open" characteristic not often associated with typical "pinched" or "honky" compression driver/horn combinations. Dayton Audio professional waveguides reveal all of the articulate, accurate sound reproduction that your HF drivers are capable of delivering, whether the application is live sound, critical studio monitoring, or demanding home audio playback.'
Problem is it's all marketing piffle. It's a knockoff of the Pyle PH612, which Pyle unapologetically calls a horn:
https://www.pyleaudio.com/sku/PH612
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