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Would magnetically damped electrostat/dynamic hybrid cans have potential?

post #1 of 3
6/24/11 at 7:36pm
Thread Starter 

Title says it all. I've worked out a driver design that is magnetically and conventionally damped and effectively splits the difference between electrostats and dynamics using a ring design. I'm going to try and build and pair and tune them to a point where I'm comfortable letting a handful of head-fiers and audiophiles demo them. I just need to find a decent speaker spider model that I can cut down to size. I don't know if this is going to be a problem, so I'll ask now. On my prototype pairs (if i can get the materials, im giving a pair to a friend who is currently using skullcandy) I plan to make the drivers 75 mm in the interest of getting to actually see what happens to the soundstage on a pair of cans when the driver encompasses the ears. Is this going to be too big to produce serious treble?

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post #2 of 3
6/24/11 at 11:59pm

I would be interested to see how you're doing this.  I'm a speaker designer myself, but haven't done any transducers appropriate to headphones.  I assume there are  some real subtleties to working with super low mass, small magnets, nearfields, etc.

 

The LCD-2 driver is magnetic planar, not a "driver" in the normal cone/voice coil dynamic driver sense, and the driver surface area is quite large.  They pull it off because the planar driver is edge coupled and as it has relatively uniform magnetic fields across the whole surgace, it moves in a more piston like manner, without as many standing wave.  For a dynamic driver, 3" seems to be getting large, and while you might be able to get the high frequencies, you have to watch for phase issues and also breakup/wave modes in the driver that will cause glare and grain,

 

I don't quite get how you are selecting the driver materials and motors, and would be curious to learn more if you're willing to share.


Cheers, and good luck!

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post #3 of 3
6/25/11 at 9:19am
Thread Starter 

I'll PM you if your interested, I just don't want to leave the technical details out on the open net if it has merit before I get a chance to refine my design to a point where I either decide I don't have the technical chops or its good enough to send a couple pairs out for demos.

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