The Stax Thread III
Jul 30, 2022 at 6:34 PM Post #22,771 of 25,529
in all of my history i have never seen a volume pot die unless seriously abused.
what you may think is a bad pot could actually be bad plate resistors, way more common on 06t amplifiers.
the dual shaft pots are very hard to source.
do you mean, talking about bad plate resistors, something like broken resistor easily replaceable with some DIY? Or something more serious?
I’m searching for picture about that to try to have a more precise idea… without success
 
Jul 30, 2022 at 6:36 PM Post #22,772 of 25,529
Just describe why you think your Pot(entiometer) is defective…makes it much easier to find out if you describe the symptoms!
 
Jul 30, 2022 at 6:36 PM Post #22,773 of 25,529
Jul 31, 2022 at 2:27 PM Post #22,774 of 25,529
SR-009 on T2 with vinyl is THE thing. I had almost forgotten. Finally got my act together with the headphone turntable setup, and it all came back. Now I remember - pure sonic magic. Even on a very good DAC most digital material has a sense of strained / forced-ness to me (note: my digital collection is 44.1 FLACs, I realize DSD is another ballgame). Versus pure ease and musical flow when you drop a good stylus. Very apparent on a T2, which itself is the latter (pure liquid organic flow). Amazing to think there's 1200x gain from the cartridge signal to phono stage, then times another 1000x gain on a T2 (and most electrostatic maps for that matter). That's 1.2 MILLION x total gain, all through active stages. How does this even work AT ALL, much less so amazingly well (noise floor very low, almost dead-quiet - actually this is quieter than my main 2ch rig, dammit). My cobbled together headphone turntable, made from 2nds / 3rds / 4ths from the main rig:
  • SOTA Nova V vacuum turntable (Koa wood!)
  • Benz PP-1 (T9) discrete phono stage (62dB) w/ SBooster PSU - I really like it when affordable gear like this sounds so sweet
  • Koetsu Onyx, version unknown - Old 1980s Musashino Lab short body, rebuilt by Koetsu with original body and samarium-cobalt (?) magnets
  • Fidelity Research FR64fx tonearm - 40 years old now. Koetsus (and most MC cartridges) love it.
Every time I put my headphone turntable setup into stasis (for...reasons), I absolutely regret it next time I remember what I was missing. Dammit, don't do that again future Mike. This setup absolutely holds up well against the 6-figure 2ch Tannoy / vinyl setup on the other side of this room. It's a blessing to hear their 2 different perspectives, each at this level.

Still need to do some more fine adjustments, continue cleaning the minor dust accumulation off my poor SOTA (look at the dirty vacuum platter lip, ugh), experiment with some more gear swaps to see if it can be taken either further.

Vinyl with 009 and T2. That's it.

1659291574760.jpeg


1659291817777.jpeg
 
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Aug 9, 2022 at 1:30 AM Post #22,777 of 25,529
It really doesn't matter which stat you put through the T2, they each seem to sound their best ever through it. The 007 in particular has just scaled so incredibly. I use to pick it up every now and then prior to this and it's pretty much become a daily driver now.
 
Aug 12, 2022 at 10:01 PM Post #22,778 of 25,529
Is there some place where one would find information on dimensions of various Stax earpads?

Reason I'm asking is interest in trying them on other (non-Stax) headphones.
 
Aug 12, 2022 at 10:29 PM Post #22,779 of 25,529
Earpad dimensions aren't in the official specs, only Stax model compatibility, and I couldn't find any community repository of that info either. In the X9000 thread, rpaltaufstax posted a comparison of the dimensions of the 009S earpads and the X9000 earpads: https://www.head-fi.org/threads/stax-sr-x9000.959852/post-17092086

You're probably not interested in the rectangular Lambda-style earpads, but I measured the earpads on my SR-L700mk2 and the vertical outer height is ~12.4 cm, the height of the ear opening is ~8.5 cm (max), the outer front-to-back length is ~8.4 cm, and the front-to-back length of the ear opening is ~4 cm. The L700mk2 pads have mounting pins on the underside that are meant to slot into matching holes on the L700's chassis. If you're putting those pads on other headphones, you'll likely need to snip off those pins.
 
Aug 13, 2022 at 12:33 AM Post #22,780 of 25,529
Earpad dimensions aren't in the official specs, only Stax model compatibility, and I couldn't find any community repository of that info either. In the X9000 thread, rpaltaufstax posted a comparison of the dimensions of the 009S earpads and the X9000 earpads: https://www.head-fi.org/threads/stax-sr-x9000.959852/post-17092086

You're probably not interested in the rectangular Lambda-style earpads, but I measured the earpads on my SR-L700mk2 and the vertical outer height is ~12.4 cm, the height of the ear opening is ~8.5 cm (max), the outer front-to-back length is ~8.4 cm, and the front-to-back length of the ear opening is ~4 cm. The L700mk2 pads have mounting pins on the underside that are meant to slot into matching holes on the L700's chassis. If you're putting those pads on other headphones, you'll likely need to snip off those pins.

Actually the large rectangular pads are the ones I'm interested in, so thanks for the measurements.

Judging by photos the EP-507 pads which are used on SR-407, SR-507 and SR-404 are larger still. Anyone got measures of those?
 
Aug 13, 2022 at 2:25 AM Post #22,781 of 25,529
@CopperFox
SR-507-
7 x 11.5 outside
3.7 x 7.2 opening
1.6 inner depth

SR-404-
8 x 12 outside
4 x 8.2 opening
2.1 inner depth

All numbers in cm
 
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Aug 13, 2022 at 2:53 AM Post #22,782 of 25,529
Actually the large rectangular pads are the ones I'm interested in, so thanks for the measurements.

Judging by photos the EP-507 pads which are used on SR-407, SR-507 and SR-404 are larger still. Anyone got measures of those?
Glad I could help, but what sort of non-Stax headphones would the Lambda pads fit on?
 
Aug 13, 2022 at 4:08 AM Post #22,783 of 25,529
Glad I could help, but what sort of non-Stax headphones would the Lambda pads fit on?

Well, there have been many headphones with rectangular casings lately, such as ones with AMT or ribbon drivers and diy e-stats as well.
 
Aug 13, 2022 at 9:37 PM Post #22,785 of 25,529
Hi friend

I'm new to Stax , now I have L700MK2 Unbalanced sound may be caused by small dust entering the driver.

And now I'd like some advice to bring the sound back to balance.

Thank you so much
 

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