greenhorn

Thanks! Now how would perform those "special batch" HE90s when fed by a HEV90??? I mean, having them adapted to STAX amps would have as a consequence a bad performance with the HEV90?

Two years ago, Sennheiser sold, through Meier Audio, around twenty brand new HE90 units. After several buyers mentioned they had problems (because they used the HE90 on other amps than the Sennheiser HEV90 amp), Sennheiser agreed to modify a bit the headphones so that they can work on any electrostatic amp on the market (because, if I understood correctly, the HEV90 amp had a very different bias than most of other current electrostatic amps). Does anybody know exactly what were the modifications made by Sennheiser at this new batch of Orpheus headphones?

I voted for the Headamp GS-X. I didn't have the opportunity to listen to this amp, but I've been told that the differences between the GS-X and a Gilmore Reference are difficult to identify (if at all) and the Gilmore Reference belongs to my personal Top 2 of headphone amps (the other one being the ATH DHA 3000).

Would amps like Audio Techica DHA 3000 (its price was more than $3000 AFAIK!) or Gilmore Reference qualify for this poll or aren't tey up to par with what is already listed?