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Old 6th September 2011, 05:59 PM   #1
PelPix is offline PelPix  United States
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Default Vastly increasing resistance?

I'm designing a new kind of headphone driver (It's not entirely new, as it's still a diaphragm moving back and forth, but I don't think the mechanism has been used before), but I've hit a snag: resistance is only 0.03ohms. If this DOES present a problem, and it may or even probably will not, I would need to bring it up MASSIVELY with as little frequency range loss as possible.

Suggestions on how to do this?

Last edited by PelPix; 6th September 2011 at 06:10 PM.
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Old 6th September 2011, 06:20 PM   #2
Boscoe is offline Boscoe  United Kingdom
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Smaller gauge voice coil wire?
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Old 6th September 2011, 06:22 PM   #3
PelPix is offline PelPix  United States
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Not applicable. It needs to be part of the circuit. The metallic part of the driver mechanism can't be a smaller gauge.
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Old 6th September 2011, 06:36 PM   #4
SY is offline SY  United States
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Transformer.
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Old 6th September 2011, 06:37 PM   #5
PelPix is offline PelPix  United States
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That's what I thought, but how could I possibly make a good enough transformer? Any tips on that?
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Old 6th September 2011, 06:40 PM   #6
SY is offline SY  United States
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A 30:1 turns ratio should be do-able without terrible problems, which will get you into a range where it can be more reasonably driven (~27R). I'd be inclined to go to a pro to get it made.
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Old 6th September 2011, 06:42 PM   #7
PelPix is offline PelPix  United States
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This ain't gonna fit in the headphone body.
I'll see what I can get made. I suppose I'll have to settle for an external box.
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Old 6th September 2011, 06:58 PM   #8
SY is offline SY  United States
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That's not a killer- most electrostats (Stax, Koss, Jecklin) have external boxes. Is this some kind of ribbon driver?
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Old 6th September 2011, 07:00 PM   #9
PelPix is offline PelPix  United States
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Yeah, it's pretty similar to a very, very small ribbon driver. I'm still in R&D with it. I just want to get a proof-of-concept working so I can continue development.
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Old 6th September 2011, 07:30 PM   #10
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For a POC you may just use a series resistor or voltage divider and drive it with an ordinary speaker output.

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Charles
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