(!) (4th Best Pair) 6FY5=EC97 GE and Sylvania NOS made in JAPAN same build (12ma and 14ma)

1 pair) 6FY5=EC97 GE and Sylvania NOS made in JAPAN same build

1 tube) 12ma Gm=15,800

1 tube) 14ma Gm=17,400 (GE)

– Wright Sound

NOS mA 10-12mA+

NOS Gm 13,000+