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Stax Sigma Low Bais and Stax Sigma Pros - Page 29

post #421 of 472
Quote:
Originally Posted by John Buchanan View Post
Interesting sounding ghetto mods there. I always thought the standard Sigma was far too dull - the 404/Sigma is a far better phone IMHO.
Although I agree that the Sigma 404 is a better ESP, the Normal Bias Sigma is definitely not dull when driven well (Naim32.5/250 through SRD7-SB).

Quote:
Originally Posted by Opethian View Post
^ Hi, I agree, compared to my Gamma Pros, my Sigmas sounded very restrained.

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?
You never know its effect on a Sigma 404 until one of tries it. I'm away from home at present so it'll have to wait for me.

As to Gamma Pros, I agree, Opethian, but I think the real mod I want to work out for them is something to raise their bass level, the way their drivers can perform in an SR-X Mk3.
post #422 of 472
Quote:
Originally Posted by webbie64 View Post
You never know its effect on a Sigma 404 until one of tries it. I'm away from home at present so it'll have to wait for me..
Indeed.

Quote:
Originally Posted by webbie64 View Post
As to Gamma Pros, I agree, Opethian, but I think the real mod I want to work out for them is something to raise their bass level, the way their drivers can perform in an SR-X Mk3.
I plan to do this when I can find a faulty SRX3 in the UK.

Sorry, in my first post I posted the wrong measurements. I have corrected the error there and see sentence below.

I cut out two oblong pieces of bogroll cardboard tube 70mm width by 65mm deep, give or take a mm.

I hope you notice an improvement of some sort folks.
post #423 of 472
I just love the Sigma/404s. Great dynamics on the SRM-717. Just listened to L.A Woman from the 1999 box set - it sounds great - no edginess whatsoever - just how I always thought recordings could sound. Turn 'em up!
post #424 of 472
I just bought Tachikoma's Sigma Pros. Does anybody know where I can find the specs for SP's?
Sorry: just found it on http://wiki.faust3d.com/wiki//index....akers_Overview

Sigma Series, Panoramic-sound Earspeakers (1977-1994)
Name: SR-Sigma (-, Pro)
Transducer shape: Elliptical/Oval
Electrode type: Perforated metal plate
Diaphragm thickness (micron): High polymer film 2 (230 V), 1 (Pro)
Electrode gap: 0.3 mm (230 V), 0.5 mm (580 V)
Bias Voltage: 230 V, 580 V (Pro)
Frequency Response: 30-35 kHz, 25-38 kHz (Pro)
Signal cord: 6-pin OFC, 5-pin PC-OCC (Pro)
post #425 of 472
Congratulations! You have one of the best and fugliest headphones ever made IMHO. The midrange is just fantastic. You may need something a bit more powerful than the SRM-006t, but give it a try. I have had good success with an SRM-717. The 404/Sigma hybrid is about the same efficiency as an SR-007 Mk1.
post #426 of 472
Thank you! I sold the 4040 system (006t included). I have an SRD7 Mk2 connected to a Yamaha amplifier. I have not decided yet which amp to buy. The 717 sounds nice but doesn't come up for sale too often.
I am looking forward to listen to the Sigma Pros. Hope mail from Australia is not too slow.
By the way, did you sell your 717?
post #427 of 472
The 717 is sold, but not quite yet LOL. It's a great amp, and if you find one, latch on to it.
And BTW, this thread is no good without pix of you wearing them.....
post #428 of 472

Not sure I am as brave as you are!
post #429 of 472
Just received my Sigma Pro's. Thanks Tachikoma! Huge soundstage and like everybody else mentioned, very pleasant to listen to, although not as detailed as the 404's. The 404's edginess never really bothered me but the SP's are softer and mellower in that regard. The solos from Bach's cantatas sound amazing.
These ones are keepers for me. Look forward to compare them with the O2's when I buy them hopefully by Christmas.
Edit: I am falling in love with the sweet and inviting sound of my SP's. I really like the sound out of the SRD-7 MK2 and my vintage Kenwood amplifier. I am rediscovering Vivaldi's Stabat Mater...... WOW!
post #430 of 472
You might want to have a listen to a Sigma/404 sometime. These are supposed to be even better than the Sigma Pros (which I've never heard). Ed has heard all 3 versions and is the guru here.......
post #431 of 472
Quote:
Originally Posted by John Buchanan View Post
You might want to have a listen to a Sigma/404 sometime. These are supposed to be even better than the Sigma Pros (which I've never heard). Ed has heard all 3 versions and is the guru here.......
Yes, I would love to listen to the Sigma/404. How do you compare them to the O2s? The SP's soundstage is amazing when listening to chamber music or chorales. Voices are just clear and inviting.
I will probably get my the O2's, although I am perfectly happy right now.
I saw an old post of Lloyd and you in which he mentioned 2 Sigma reviews. One of them mentioned a boomy sound at 60 Hz and a reduction in the 2-5 Hz range. I tried different settings to adjust for those "shortcomings". They sounded a little brighter and the mentioned booming at 60Hz decreased, although I am not certain it improved the sound; it just sounded different. I know equalization is frowned upon by some, but I find it fascinating, and I am not sure it is any different that choosing different components to emphasize brightness or bass. But of course this is just my opinion.
post #432 of 472
The O2s are a great phone - flatter, greater dynamics and much more extended top and bottom end, but the midrange vocals magic is in the Sigmas. The Sigma/404 is closer to a flat headphone compared with the Sigma original.
post #433 of 472
Just thought I'd share an interesting theory (I read it at a Japanese site but so far there is no proof for this but it seems very logical): at the end of its lifespan (1995, last production year) when the Lambda Signature had already been discontinued, the Sigma Pro was fitted with the drivers from the Lambda Nova series.
So from the already rare Sigma Pro there is a probably even rarer version that uses different drivers and might sound totally different from the others.
post #434 of 472
Interesting. If this is true, is there a way to tell them apart from each other?
post #435 of 472
Maybe looking at the drivers from the inside, the Nova driver may have golden ring around it while the Signature has a black ring. But since the drivers are mounted differently in the Sigma shell, they might have made the drivers differently and it that way it might be impossible to tell.
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