The Stax Thread III
Aug 21, 2020 at 9:19 AM Post #18,979 of 21,392

armani006

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Aug 21, 2020 at 10:38 AM Post #18,980 of 21,392

kevin gilmore

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252 is pro bias only.
srm-Xh, Srm212, SRM252 are all pro bias only.
fairly easy to modify if you want standard bias.
 
Aug 24, 2020 at 8:39 AM Post #18,983 of 21,392

jsts

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Sketch of the CCS-mode board for the SRM-600. Moving forward little by little :) Mr. Gilmore, mr. Lin, thank you!


Finally I developed and manufactured a board for CCS-MOD for my SRM-600. I'm starting to solder the parts :)

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Aug 24, 2020 at 10:35 AM Post #18,985 of 21,392

jsts

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Does such a board exist in any form for the T1 series?

I have not seen a similar board for T1 with mounts on existing screws. But the T1 has a different layout of tubes and plate resistors, so my form-factor is not exactly suitable, you need to develop another one.
 
Aug 25, 2020 at 3:55 AM Post #18,989 of 21,392

Bingturong

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Actually has anyone ever done a sound comparison between the SRD-X pro and the smaller stax amps? I have a normal bias SRD-X, somewhere, and the full-sized amps are definitely a lot better in every way. Still not too bad for something running on six D-cell batteries.
 
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Aug 25, 2020 at 4:38 AM Post #18,990 of 21,392

Eich1eeF

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To explain to myself:
I have already overcome the high-end phase and am aware of the sense and nonsense of high-end devices.
But I have no experience with electrostatic headphones, so I wonder what influence an amplifier can have in this case
Higher peak-to-peak voltage swing, more current, better THD and SNR. The voltage (and power) requirements of the Stax headphones differ a bit, the SR-007 is apparently the hardest to drive. I'm not aware of any objective measurements of the resulting effect. Since you have a 252, I'd suggest taking that and your own headphones to a dealer that has some amps to compare it to. I'd recommend MSP in Cologne, I think the last time I've been there, they've had a 353 and a 007t on display. Alternatively, if it doesn't get cancelled, the German Stax importer is usually at http://www.westdeutsche-hifi-tage.de/, but they are in a noisy shared room on the ground floor.
 

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