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In Reply to: RE: Nice looking Dunlavy type speakers. posted by DanWilson on January 22, 2017 at 01:42:26
Dan, lots of speaker companies utilize what many call the D'Apolito driver configuration, W/M/T/M/W, not just Dunlavy (Duntech and DAL).
However John incorporated step-backs in his front panels for each driver. That, along with the first-order crossovers, was to achieve his time/phase design objective. Also I'm not aware of any of his designs which were ported, he believed in sealed cabinets. So those pictured don't really look like a John Dunlavy design.
"The piano ain't got no wrong notes." Thelonious Monk
Follow Ups:
I remember the Snell C speakers in the early 90s tried to have that Dunlavy type look in a more compact looking speaker.
Again Dan, I don't know why you call this the "Dunlavy type"?
Many manufacturers have utilized a M/T/M or a W/M/T/M/W vertical array. John Dunlavy did not create it. More commonly it is referred to as a D'Apolito array. That may be correct for driver placement but even then there is more to the overall design concept since I think Mr. D'Apolito specified the characteristics in the crossover as well for consistency with his design parameters.
To be a Dunlavy type a speaker would need to incorporate time/phase coherency (step-back cabinet panels for each driver and first-order crossovers) and be sealed box. I owned Duntech Princess speakers for 19 years and over that time I had personal conversations with Mr. Dunlavy and auditioned many of the Duntech and DAL models.
"The piano ain't got no wrong notes." Thelonious Monk
Dunlavy speakers and Duntech Classic series.
D'Apolito array, AND nice looking step response on the oscilloscple if the mic is located on axis at certain distance.
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