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Yep, they are pretty interesting. I remember somebody modded a T50 (the old version, not the current RP version); removing magnets from one side. If I recall correctly the reaction was favorable as well. But I would still call this a planar magnetic driver. (Regardless of Orthodynamic, Isodynamic, regulated phase or whatever terminology the marketing department comes up with.)
Yeah, planar magnetic regardless. The same principle as Infinity EMIT/EMIM drivers, and Magnepans. Wound conductor (either glued on wire as in Maggies, or etched in foil as in Infinities) on a substrate (Mylar for Maggies, Kapton for Infinities), suspended in a magnetic field.
Ahh, the sweet planar sound...
Sorry, vintage Infinity fan here.
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Well I've often thought that one of the problems with the ortho design was the backwave pinball that must result from the "magnet sandwich" ortho design, so this would surely reduce that.
Obviosuly there are benefits to it, otherwise why would every high end and historical ortho use it?
Taking out magnets from one side results in less controlled diaphragm. You gain some, you loose some. I would be very interested in hearing comparisons between the HE5LE and the HE4 specifically on how much resolution each offers.
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@ujamerstand: That avatar is creeping out big time
Gotta love old educational videos. and Boards of Canada.
Interestingly, Infinity started with push/pull vertically oriented rectangular designs for its EMIT tweeters, followed up with a wider, larger diaphragm version (called the High Energy EMIT; better in all respects, especially dispersion), and then finished with a round, push-only design called the EMIT-R
I'm certain that the biggest reason for the round push-only tweeter was cost-related - the '90s high end Infinities used the High Energy EMIT, and the EMIT-R was used for everything else (oh, and as the rear tweeter for the '90s dipole IRS models). I believe the round design has better dispersion than the older rectangular design, although I can't say how it compares to the High Energy EMIT in that respect.
On the other hand, Genesis (the spiritual successor to pre-HK Infinity) uses only the round, push-only design - despite producing speakers equal to the best of the Infinitys. There's definitely more to it than just cost.