Originally Posted by audiomagnate
Maybe there's some fundamental difference between the Sigma and the Gammas. I know for a fact the SRD-X was sold with Gammas. Those are Gammas, not Sigmas in the photo above. The caption is wrong.
To further add to the confusion, the Stax historical site http://www.stax.co.jp/ENG/History.html
states "Any of Stax Earspeakers can be connected to the SRD-X" and the SRD-X came out two years after the Sigmas. Why not plug 'em in and see what happens? I kid!
All low bias Staxes are completely interchangable. All pro bias Staxes are completely interchangable.
The only difference you'll encounter going between a Gamma and a Sigma is in terms of efficiency, but that's easily fixed with a slight twiddle of the volume knob.
Originally Posted by Duggeh
Actually that picture doesnt say gamma or sigma, it says alpha, which was used to market the gamma in the usa i believe, although Carls yoru man for that sort of nickpicking. There was also a moving coil stax headphone which was the alpha too though.
Alpha is the Japanese name, Gamma is the American and German name.
The only descernable reason for the difference is that there was never a low bias version of the Alphas (ie, the Alpha is the same as the Gamma Pro). The low bias gamma used the same drivers as the SR-5N and SR-Xmk3.
Originally Posted by Meyvn
Actually, the photos above depict the alfa pro excellents. Notice the 'a'-like Greek symbol. Then again, they're part of the Gamma series, I think? Either way, those are pro bias, and the SRD-X this guy has is a non-pro unit.
Indeed, those are the Alpha Pro Excellents. One of two headphones on my "want" list.
The Apero Alpha is a different and inferior headphone, and isn't electrostatic.