Those are something else!
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- 140 posts total
Looks like fun to build but a lot of work for a single driver system. The bass is still going to doppler distort everything else the driver does. For such a large speaker why not do a two way transmission line speaker. There are excellent passive crossover designs out there or use a digital crossover. |
That is a patented " wide-range coherent transmission-line" design. Lincoln Walsh - Wikipedia Not the same as a box speaker transmission line design. Definitely a lot of work to design and build! Nobody else even attempts it like that (1 full range physical driver, no electronic crossover) these days. It’s a classic design though realized via modern techniques and materials. Different designs...different goals. “Coherent Wave Transmission Line Drivers” www.hhr-exoticspeakers.com (hhr-exoticspeakers.com) Most unique! |
Charles, right, thank you. I was trying to recall Tonian Labs name.IIRC Tonian no longer carries the PHY product. He used to be the importer. Samuel Furon of Ocellia has taken over PHY. He has an office in Canada and does distribution from there. Since the bass can be handled by a subwoofer, its really only important that a full range driver make it to something less than 70Hz or so. That is why I find the 6" PHY appealing, since it can do that (in the right cabinet) with fairly smooth highs. Duke LeJeurne designed a sealed box for this speaker which also employed a pair of rear-firing Fostex tweeters. The main driver had no crossover. I did some pink noise measurements and that design made it to 70Hz fairly well- no leaness, and the rear-firing tweeters helped it with not being beamy in the highs. PHY has a rear-loaded horn design for their 8" and 6" drivers; I'm hoping to hear one of those fairly soon. |
- 140 posts total