Has anyone out there heard of a "Type 1" Stax headphone? I saw a quote from a circuit saying suitable for "the popular Type 1 Stax headphone", but ive never heard of a type 1 & couldnt find anything on the Stax site.
The design presented in Figure 6 will deliver nearly 200 Vp-p across the full audio bandwidth when interfaced to the popular Stax type 1 electrostatic headphones. A bias of 200 V DC is shown although the resistive divider can be altered to provide a bias voltage up to 400 V DC. Note that many of the Stax type 1 headphones have similar drive and bias requirements making this design suitable for these models as well.
I wonder what actual Stax headphones they are referring to? I would imagine its a waste of time emailing TI.
he could perhaps be referring to the Stax SR-007Ω Mk1 ie Omega Mk1 vs the O2 ie Omega MkII. or the 1 isnt meant to be there at all and its simply intended to say 'the STAX type electrostatic headphones have similar drive and bias levels....' which would be false as well, methinks the person who wrote this did not have any clue about STAX personally, to be calling them 'popular'.
It could simply be referring to normal bias as type one, vs pro bias. as pro bias could not be driven with such low bias. normal bias is 200-230V, which fits well with the amp design.