Headphone Amplification

I finally got this guy from fed ex this morning but have only listened to a few CD's on it. So far I like it over my old amp which was an SR-71 [sic] and sick. I'm using this amp with my only piar of reference headphones that I have on me right now which are HD650s. When I get my sr325's back I'll see how this amp pairs with them. I'm using them out of a harman/kardon hd710. This is the most laid back amp I've heard, though it should be noted that I haven't heard a lot. There is a real focus on the midrange and upper midrange. Trebble is present but this amp is by no means forward. This amp produces little bass and what bass there is has little punch. That's the only …

Dear All - What tube improvements can be made to Stax007tA over the stock tubes? Are matched pairs available or is there any change needed to be done to the board? Also any recommendation on exernal PSU to improve SQ? Thank you

Can you help me with schematic of Stax SRM007tA amplifer please ? (100 V Japan version)

Damn you LAiV. Just after I’m satisfied with your Harmony µDDC and µDAC you release a new, cheap combo DAC-headphone amp. Yo Rob!