Selling my ZROCK2 serial # 029. Original owner built in Nov 2013. Standard bare bones config with no special treatments. Original RCA red tip 5963 and extra GE 12AU7 included. Raven power cord upgrade also included.
Full Disclosure: I sent this back to Steve after I noticed a hum which would increase with volume. He checked the unit out and found no identifiable defects. Upon return, the hum remained. I can only surmise that the ZROCK does not meld well with my newer components. I used it with great satisfaction before component switching. It is an amazing device! I hope that someone will enjoy it as I have.  Price is $ 1000 . I will cover shipping and insurance in CONUS. Best Regards, Mike.   Feel free to text with questions 434 409 1280    PayPal or certified check ( shipped when check clears)