I'm using cryoed EH6922 purchased from ATSI in Florida. These tubes are among the very best in my Audible Illusions L1 linestage.
These tubes are barely indistinguishable from NIB/NOS Amperex PQ white label (USA). Compared to non-cryo Russian/Czech tubes, they have a tighter, less woolly bass, more neutral midrange, and a cleaner slightly more extended treble.
These tubes are barely indistinguishable from NIB/NOS Amperex PQ white label (USA). Compared to non-cryo Russian/Czech tubes, they have a tighter, less woolly bass, more neutral midrange, and a cleaner slightly more extended treble.