I'd heard about the Nezzar amp so contacted Erik Konka--this is the update, tho not sure what the changes are. (Birgir says this looks like the Senn HEV-90 circuit.) We went back and forth a bit--he had to source a US voltage transformer--and I ordered about two months ago. It took a month to ship, but in a sturdy plywood crate with styrofoam inserts. Also included was a second set of tubes. Cost was 1400 Euros--it would have been 100 more but Erik didn't have a US power cord for me. This replaced a SRM-007A I was using with L300s. I wasn't unhappy...