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Stax Sigma Low Bais and Stax Sigma Pros - Page 28

post #406 of 472
Quote:
Originally Posted by spritzer View Post
I removed it mostly to make the phones easier to reassemble (I strip them all the way down) but I found the phones a bit less bloated with less damping. On any of the Sigma's that is a very good thing.

The earpad mesh has no bearing on the sound but is uncomfortable for some.
I am feeeling up the mineral wool in my Sigma and it does compress down to about 1/4 in or so...it may have been "adjusted" already. How much can it be stripped down? .........I guess I start doing it myself to find out...Still driving them with a srd7 mk2 and dared clone amp (using brimar 12au7's add a nice touch of detail and forwardness). I another week or two will hear how the EC ZDT does.
post #407 of 472
Padam....welcome to the Team!

So Scotty....did you try out your Sigma/404 on the Big amps? Let us know your impressions. I have high hopes on the Woo WES, especially if its output voltage is being increased from 400 to 800, which I read from another poster.

Bonemaster: I have tried to get in touch with Yama's a couple of tiem and no answer...what does it cost now to get the conversion done...if you supply a sr 404 unit?....in my case I have a sr303.
post #408 of 472
Quote:
Originally Posted by tako_tsubo View Post
I am feeeling up the mineral wool in my Sigma and it does compress down to about 1/4 in or so...it may have been "adjusted" already. How much can it be stripped down? .........I guess I start doing it myself to find out...Still driving them with a srd7 mk2 and dared clone amp (using brimar 12au7's add a nice touch of detail and forwardness). I another week or two will hear how the EC ZDT does.
It really depends on how old your set it. The older models were stuffed with wool so start off removing the loose pieces around the drivers. If your set doesn't have those then I would just leave it alone for now.
post #409 of 472
Thread Starter 
Bonemaster77- New Sigmas still sounding great. How about changing something external like interconnector cables? That might improve your sound. Scottsmrnyc
post #410 of 472
Thread Starter 
Hey, here is a question for you Sigma owners,

What are some great sounding Cds, Vinyl etc for the Stax Sigma Pros and Sigma Non Pros?
Scottsmrnyc
post #411 of 472
Anything by Santana, 70's vintage. I especially like Abraxas...."Singing Winds, Crying Beasts"
post #412 of 472
Thread Starter 
I have been listening to Abraxas since it came out in 1970, I think. Singing Winds, Crying Beasts certain fits into the Sigma sound very well. Yesterday, Barnes and Nobles in NYC was having a sale so I picked up a special edition of Miles Davis- Kind of Blue. It is the Legacy Edition with the main album and then some studio out takes on it. I have been a Miles fan for a lot of years and does that sound special on my Sigma Pros. I am running my Sigma Pros through an SRDX Pro Portable adapter- which I can also plug into an outlet if I need to. Not really an album or Cd but, I listen to a lot of internet radio and enjoy listening to Hearts of Space on my Sigma Pro set up. Thanks for your input Tako. Scottsmrnyc
post #413 of 472
I have a question: could I convert a single bias sigma into a Sigma/404?
How far behind are the single bias Sigmas sound wise from the Pro and Sigma/404?

EDIT: my bad. it seems it can be done.
post #414 of 472
Single bias??? The normal bias Sigma are by no mean inferior to the other models, just different.

I've done the mod a few times and it can be done but to really do it properly you have to disassemble the SR-404 drivers. You definitely have to know what you are doing there...
post #415 of 472
The Normal Bias Sigmas sound very good from the srd7promk2 , with the ZDT. I also have a class A/B integrated amp the onix/melody SP3 with upgraded tubes and the Sigma sounds very good too. Still not sure which I prefer.They overall are a warm sound with less detail upper mids and treble ( from the 007)...thru the energizers. But so far the zdt/sp3 combo have the best detail yet of all the amps I have tried. It remains an overall warm sound...which I like. The addition of the 404 drivers I believe brightens them up? ...haven't heard. But for that brighter sound and detailed I have the Senn HD800's.


I have the SR 303 and saving them for if I ever want to try the Sigmas with the pro Lambda drivers or if the drivers of the sigma ever break. But I am not sure that it will be a easy to moderately difficult DIY job.
post #416 of 472
Thanks for the answers. I am prowling trying to get me a pair so far without success. They had one on eBAY but the auction ended abruptly.
post #417 of 472
Quote:
Originally Posted by tako_tsubo View Post
The Normal Bias Sigmas sound very good from the srd7promk2 , with the ZDT. I also have a class A/B integrated amp the onix/melody SP3 with upgraded tubes and the Sigma sounds very good too. Still not sure which I prefer.They overall are a warm sound with less detail upper mids and treble ( from the 007)...thru the energizers. But so far the zdt/sp3 combo have the best detail yet of all the amps I have tried. It remains an overall warm sound...which I like. The addition of the 404 drivers I believe brightens them up? ...haven't heard. But for that brighter sound and detailed I have the Senn HD800's.


I have the SR 303 and saving them for if I ever want to try the Sigmas with the pro Lambda drivers or if the drivers of the sigma ever break. But I am not sure that it will be a easy to moderately difficult DIY job.
Sigma/404 is not too bright, but definitely more detailed with better treble - while it still remains warm sounding, and works well with ZDT/SRD-7 Pro at the last CO meet.
post #418 of 472

Stax SR Sigma NB Tweak...

Hi Guys,

Well you will love me or hate me for this but trying to figure out how to get a bit more of a detailed sound out of my Sigmas, I tried this modification with the Stax Lambdas in mind, sort of.

I took a cardboard tube from a used bog roll, I cut out two oblong pieces 70mm width by 65 deep mm and put them inside the Sigma housings using the curvature to cover up the damping material and to direct more of the sound into my ears.

Well, I really need a second opinion because my ears are 54 years young but to these ancient ears the sound was less ambient more focused and dynamic range was enhanced.

The headphone amp I use is a SRD-X Pro.

Easily reversable, if you try this you need to experiment with flattening the curvature of the cardboard insert so it fits snugly inbetween the far inside edge of the driver element and the LH side of the earpad.

To remove you have to press the cardboard insert into the damping material near the driver element and lift it out by the earpad.

I had wondered if this had ever been tried before?

Try this with an open mind, PLEASE, just don't spit on me!!

One question, is their a tweak or 3 regarding the SRD-X Pro? The sound is very good but the LR balance control on mine is all the way to the right channel, I know my Sigmas are balanced because I have used them with a SRD7 SB and amplifier, they were spot on balanced.

Have fun Headflyers.
post #419 of 472
Interesting sounding ghetto mods there. I always thought the standard Sigma was far too dull - the 404/Sigma is a far better phone IMHO.
post #420 of 472
^ Hi, I agree, compared to my Gamma Pros, my Sigmas sounded very restrained.

Still a very pleasing sound with certain types of music.

I only did this mod last night, I compared the sound with my Gamma Pros, they, the Gammas are so in your face by comparison but once my ears aclimatized to the lesser dynamic of the Sigmas, I preferred the Sigmas.

I was playing Joe Satrianis "Time Machine" live CD, not a brilliant recording but it did sound better with the cardboard inserts inside my Sigmas.

I am a little way away from the 404 Sigma mods, I guess this cardboard insert maybe to much of a change with the Sigma/404?

Great Avatar btw.
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