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In Reply to: RE: Magnetostats posted by Green Lantern on May 22, 2017 at 04:11:03
Greg Takesh makes these handmade speaker himself. Yes, he makes the drivers by hand. They have a magnetic planar bass/midrange that uses copper foil on the light mylar and therefore is said to have less mass than magneplanar and B$G Neos. The midrange is efficient and it rolls off on the top itself so there is absolutely no crossover on the bass/midrange panel. It runs from 40 hz to wherever it rolls off (not specified). Then a planar or ribbon type tweeter does the rest with apparently just a cap for the xover. From what I can gather from posts all over the net these things may be the best planars in the world.
However, Greg is a one man army and it takes him a month to make a pair. $9000 for the big one and $6000 for one with less drivers (2 of each instead of three).
There is one dealer in NY and he will show at the Captitl Audio fest in Nov. A friend of mine is thinking of getting a pair. I bet they are killer!
Follow Ups:
These are a DIY project from a guy from Hungary trying to go commercial. Not GTs.
are you sure the GT model 3 is a 3 way? It is with the subwoofers, but the planar section is 2 way IIRC.
I just wanted to let people know of another hand made Planar speaker that is actually available (if you don't mind waiting for them to be made) and maybe something truly really seriously great. No woof/midrange crossover, low mass, efficient....me want!His older ones had powered woofs and were 3 ways.....now he makes only two way planars and you add your own subs.....However, the big one will play good bass without sub but super bass with sub.
Edits: 05/29/17 05/29/17
I was wondering if he did the particular choice of copper traces in order to gain a lower acoustic roll off - but that would also cost him sensitivity vs. Aluminum. Assuming the mid/bass driver is 8" wide he would have had a rolloff at under 2khz anyway. So at that freq. the heavier copper traces might not be a bad tradeoff considering that copper is easier to work with and sounds better than Aluminum carrying a signal.
In my setup the Neo8 mids (6 per side) carry to their acoustic rolloff and have just a protective cap at ~110 hz. Their bass rolloff is 250hz or so (2nd order acoustic), thus there is pretty much no phase through their output range. The ribbon is (similarly to ET and Apogee, and now GT) put in with just a high pass (cap) and it only plays in the top octave. I am assuming the GT tweeter would come in at a much lower 2khz or so - which is difficult to do with an Al tweeter without reinforcement with polymer backing. That would also require a suspension to avoid torsion when operating below 5khz.
On the provided link is a dealers description of the difference between the $35,000 Radia 880 speaker (six neo 10s and 16 neo 3s on open baffle with $10,000 external xover) and the GT Audio Works speaker.....very interesting. I use one Neo 10 and one Neo 3 on open baffle with 12 db per octave xover at 3K and it is really good....but I want to get rid of the stupid coil in line with the mids.....seems you have done that with your array of Neo 8s......are you using the Neo 8 regular, pdr or 8S?
http://www.audiocircle.com/index.php?PHPSESSID=icm8ojuu9fpe4n6k814jpbektdcpnkv5&topic=149153.0
I am using the old neo8 They were initially intended to be crossed over to the tweeter at 5khz. But having played the line arrays on their own with no crossover, the magic of phase free midrange became glaringly obvious. So I tried to use the tweeters as a supertweeter instead and leave the Neo8s to roll over on their own. The cavity resonance peak disappears in the far field once you have 6 or more drivers in a line, so the big bulge in the FR is gone and it is flat on axis to 12 khz and -3db at 14khz.. 15 deg off axis the line is rolling off at 10-11 khz. So you can solve the problem right there. You can do the same with a line of Neo8 PDR and add a Neo3 (is there a PDR version of it still?) at the center to cover the higher freq as a supertweeter above 15khz -- or get a real ribbon - there are a few dipole real ribbons and you can just use a single ended ribbon at these freq, Nudel says it works better than a dipole tweeter. .
The Neo8S and Neo10 have a corrugated suspension which improves their low Freq performance but at the cost of some detail and clarity - which they obviously thought was worthwhile as most users used them as midranges so didn't care what they did over 2khz.. .
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