Speakers full-range with a high resistance. - diyAudio
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Old 27th August 2012, 08:21 AM   #1
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Default Speakers full-range with a high resistance.

Self-designed full-range speaker with a high resistance. Especially for transformerless tube amplifiers. Rated impedance 1000 ohms. However, he has a very weak dependence on the frequency of resistance at medium and high frequencies. Provisional title 10GDSH-1-1000.
Diameter of 8 inches
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Last edited by Svjatoslav; 27th August 2012 at 09:03 AM.
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Old 27th August 2012, 09:02 AM   #2
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Nice job; first units of this type I've seen since the old Philips 800ohm drivers from the 1950s - '60s.
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Old 27th August 2012, 09:11 AM   #3
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Thank you!
In his designs try to get rid of reactive elements as possible. In this case, despite the multi-layer coil was reduced reactive parameter - inductance.

Last edited by Svjatoslav; 27th August 2012 at 09:30 AM.
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Old 27th August 2012, 09:32 AM   #4
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A scheme in which they work.
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Old 5th March 2013, 08:43 PM   #5
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Succeeded in producing a full-range speakers impedance 2000 ohms. Complete with amplifier for tubes 6C4C. Frequency range of the complex 40 - 20 000 Hz.
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Old 6th March 2013, 04:45 PM   #6
otc is offline otc  Denmark
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Very impressive. Congratulations to Your fine work.
I have a Philips amplifier for 800 ohm speakers and have puzzled with the idea of rolling voicecoils for existing low-impedance units.
You are rolling voicecoils Yourself?
I am interested in hearing Your experiences with this work. And the challenges.
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Old 6th March 2013, 09:46 PM   #7
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Voice coils are made to order, using special equipment, according to my drawings.
If You notice, these speakers have very low inductance. It is much lower than that of their counterparts of low resistance.
Do You have a Philips 800 ohm speakers?
You could not measure their Z, Phillips 800 ohms at a frequency up to 200 kHz?
It is very necessary for comparison.
Here's what's interesting. Sound from low-inductance full-range speakers to a "normal" 8 ohms is very different from the sound of the same full-range speaker, but with a "normal" inductance.
Inductance frequency dependent.
Therefore it was necessary to introduce the term "doubling the minimum impedance " F2z.
Typically F2z=7-15 kHz for full-range speakers.
The same was observed with high-resistance full-range speakers.
It would be ideal if F2z exceeded the sound range.
As is the case in high-frequency speakers. Better if twice F2z = 31-40 kHz.

Last edited by Svjatoslav; 6th March 2013 at 10:05 PM.
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Old 6th March 2013, 10:01 PM   #8
sreten is offline sreten  United Kingdom
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Hi,

FWIW AFAIK you could never sell commercially any speakers
of ~ 1Kohm and any amplifier that is capable of driving them.

The standards just don't exist for high voltage speaker drive,
and though no expert, I'm sure you'll fall foul of the allowed
standards for whatever speaker connection method you use.

rgds, sreten.
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Old 6th March 2013, 10:21 PM   #9
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Phillips was the standard of 800 ohms?
So why not be the 2000 ohms?
.................................................. .............
Such systems are already working in Ukraine, more than a year.
The first of these resistance of 1 000 ohm. Two-way.
Two months operates two full-range speakers impedance 2000 ohms.
.......................................
I am an engineer. Itself can develop the standard. In the extreme case)))
Especially if there's a good theory, and not just one hammer for its implementation. )))

Last edited by Svjatoslav; 6th March 2013 at 10:34 PM.
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Old 6th March 2013, 11:37 PM   #10
sreten is offline sreten  United Kingdom
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Hi,

You can't develop the "standard". It will always
be illegal in terms of consumer products to sell
an amplifier that can drive your speaker units,
with any form of current speaker connection.

Stupid but true AFAIK.

rgds, sreten.

I don't know what the actual voltage limits are.
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Last edited by sreten; 6th March 2013 at 11:41 PM.
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