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In Reply to: RE: The Pros and Cons of Horn Speakers posted by hahax@verizon.net on August 21, 2024 at 20:23:34
The do have some directivity but an array of sources (individual drivers) produce an interference pattern that changes with frequency not a single lobe like a horn. Two or more sources can only combine into a single new source if they are less than 1/4 wavelength apart at the highest frequency, at 1/2 wl and beyond, they are completely seperate sources..
This is why one normally only see's smoothed predictions and not measurements for those where as there are Klipple measurements for other non array speakers.
Follow Ups:
From listening to good line sources it's not a huge problem though you are correct it's there. But everything is a trade off and horns have strong plusses(many I admire) but they do have other problems such as getting deep horn bass with a manageable size so the sound Quality doesn't change from non horn bass(to get useable size) to horn mids.
Arrays of direct radiating woofers can do fine matched with horns. When I had Altec A5s I used a pair of JBL 4648 bassbins to augment them below 100hz. With wall placement and 6db of boost at 30hz they were flat to 25hz , still very sensitive and more importantly they tracked the dynamics of the Altecs. Yeah, I know you're not supposed to EQ vented boxes below F3 but the 2226 woofers, 4 of them, took it in stride with no distortion or untoward behavior.
Cool! Totally Cool!!
My horn loaded sub measures 11 cubic feet. IMO that's not overly large, especially as it does double duty as a table. And yes, the quality of horn loaded bass is superior to direct radiators, not only in terms of much higher sensitivity but also much lower THD.
Avantgarde's approach for their "sensibly-sized" systems is not to attempt to horn load the bass, but to effectively use a subwoofer to deliver ample bass that extends well down. They include twin 10" or 12" high quality drivers with no horn - so similar to a sub.
Their "daft-sized" systems do use horn loading for bass, but most people's rooms can't accommodate these monsters!
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