Today I finally had some business meeting close to the only shop that sells the X9000 in the country and was able to give it short listen and compare it with the 009S. The chain was a PS Audio Directstream DAC on a STAX T8000.
Conclusions from other parties here seem quite in line with what I would conclude myself from that short period of time:
- the X9000 definitely has STAX DNA
- build quality is absolutely gorgeous and - like the 009(S), it's extremely comfortable
- the X9000 has a notably bigger stage bigger/wider stage than any other STAX i've heard
- the X9000 sounds more distant / diffuse / smooth compared to the 009S while still having extreme resolution/detail
- bass amount on the X9000 seemed maybe a touch more than the 009S but not 007MK2-level
Overall my short impression was that the X9000 does give a different flavor of TOTL STAX respectively electrostatic sound and while it was preferable on some songs I prefered the 009S on others.
Definitely need to give it another listen go get some more insights. Could have walked home with a X9000 but decided I need to give it another listen before shelling out that amount of cash on another TOTL ... well for today that is