Great info, thanks. The SRM-212 drives my SR-202 (Basic System II, SRS-2020), and it made me curious about running the KOSS ESP950 with it thru an adaptor.
I can always grab a better STAX amp to run the KOSS with too, as many suggest it really opens them up to full potential.
Maybe on the big ESP950 thread here, there is probably some posts as to which STAX amp matches the 950 best, and I'd like to go solid-state (preference).
Great point about RMS output voltage - the SRM-212 puts out 280V. The E/90 output is 600V (differential) & ( ? 2300V (push-pull with soft limiting) ?=?meaning? )
Would like to keep the cost down (< $500) if going that route; there are some STAX amps offering really great value (superb sound per dollar) - I think, such as - primarily interested in SRM-1 MK2 Pro at 370V first choice, or SRM-313 at 350V, (nice as along with Pro bias socket they also both have a normal bias socket to run Lambdas on for versatility) and then maybe SRM-323 at 400V or SRM-3 (only at 300V), but not sure which models match the ESP950 well sonically. If the SRM-1 MK2 Pro matched the KOSS well, I might grab that model.
Do you think output voltage RMS of 350 or 370 or 400 could drive the KOSS ESP-950 ? Is that enuff voltage ?
For SRM-1 MK2 Pro it was made in the versions A, B or C and wonder if specs were same, or if any 1 of the 3 matches ESP950 better.
Together with your advice it gives some options to look forward to.