User Feedback on the Sophia Electric Blue Glass 6SN7 tubes in the Woo Audio WA22

The Sophia Electric blue glass 6SN7 tubes are far superior to the ones I thought I had as an upgrade (RCA JAN CRC 55691)—simply unmatched. Your tubes transformed my amplifier Woo Audio WA22, delivering an incredibly dynamic, 3D, fuller, and wider soundstage. I never imagined tubes could make such a difference. Thank you once again!

Andrew