So full-range drivers don’t have to be designed from the ground up with a phase plug as an initial design criteria? Based on all the different phase plug and whizzer cone designs I’ve seen, which appear to be the result of careful optimizations, I thought it would be a little more involved.
I was an early adopter of the 40-1197 phase plugs in my "Hi-Tweek Black Box Nearfield Monitors" and I can tell you that they were pretty good before, but they took a giant leap in sound quality after the phase plugs were installed. In fact, despite the fact that I have a total of $27 USD dollars invested in them, they have received very positive comments by all that have heard them. Just to put it in perspective, I've entered them in "The Puget Sound! DIY Speaker Contest" several times and they have consistently placed well up in the ratings, even beating 2.5-way speakers with $1300 of Scan-Speak drivers and crossovers. I get a measured (by Dan Wiggins using Praxis), in-room FR of plus/minus 1.5 dB from 65Hz to 15kHz in a Bass Reflex cabinet.
The plugs are a quality product and can really improve the sound of most drivers. I wouldn't worry about "optimized" plugs, like the ones on a Lowther thread (the older Lowthers had several problems that have been corrected). I wouldn't hesitate as Dave's plugs will almost certainly improve the sound of your drivers over what you have now.
Best Regards,
TerryO
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Audibility of Doppler distortion
I found this article, Stereophile: Red Shift: Doppler distortion in loudspeakers, on the audibility of Doppler distortion... quite interesting!
I found this article, Stereophile: Red Shift: Doppler distortion in loudspeakers, on the audibility of Doppler distortion... quite interesting!
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