Vastly increasing resistance?

PelPix · 06:10 PM

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?

Boscoe · 6th September 2011, 06:20 PM

Smaller gauge voice coil wire?

PelPix · 6th September 2011, 06:22 PM

Not applicable. It needs to be part of the circuit. The metallic part of the driver mechanism can't be a smaller gauge.

SY · 6th September 2011, 06:36 PM

Transformer.

PelPix · 6th September 2011, 06:37 PM

That's what I thought, but how could I possibly make a good enough transformer? Any tips on that?

SY · 6th September 2011, 06:40 PM

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.

PelPix · 6th September 2011, 06:42 PM

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.

SY · 6th September 2011, 06:58 PM

That's not a killer- most electrostats (Stax, Koss, Jecklin) have external boxes. Is this some kind of ribbon driver?

PelPix · 6th September 2011, 07:00 PM

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.

phase_accurate · 6th September 2011, 07:30 PM

For a POC you may just use a series resistor or voltage divider and drive it with an ordinary speaker output.

Regards

Charles

6th September 2011, 05:59 PM	#1
PelPix diyAudio Member Join Date: Sep 2011	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.

6th September 2011, 06:20 PM	#2
Boscoe diyAudio Member Join Date: Feb 2010 Location: England	Smaller gauge voice coil wire? __________________ I thought about it once, but then thought again.

6th September 2011, 06:36 PM	#4
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Transformer. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

6th September 2011, 06:40 PM	#6
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	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. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

6th September 2011, 06:58 PM	#8
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	That's not a killer- most electrostats (Stax, Koss, Jecklin) have external boxes. Is this some kind of ribbon driver? __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache


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6th September 2011, 06:22 PM	#3
PelPix diyAudio Member Join Date: Sep 2011	Not applicable. It needs to be part of the circuit. The metallic part of the driver mechanism can't be a smaller gauge.

6th September 2011, 06:37 PM	#5
PelPix diyAudio Member Join Date: Sep 2011	That's what I thought, but how could I possibly make a good enough transformer? Any tips on that?

6th September 2011, 06:42 PM	#7
PelPix diyAudio Member Join Date: Sep 2011	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.

6th September 2011, 07:00 PM	#9
PelPix diyAudio Member Join Date: Sep 2011	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.

6th September 2011, 07:30 PM	#10
phase_accurate diyAudio Member Join Date: May 2002 Location: Switzerland	For a POC you may just use a series resistor or voltage divider and drive it with an ordinary speaker output. Regards Charles

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