(!!!!) (Best Pair) JAN-6189=12AU7WA Sylvania NOS 1972-1973 (9.3/10.4ma and 9.6/10.6ma) 1-3% matched

1 low noise pair) JAN-6189=12AU7WA Sylvania NOS 1972-1973

1 tube) 9.3/10.4ma Gm=2200/2300 (1973)

1 tube) 9.6/10.6ma Gm=2100/2300 (1972)

Matched on Amplitrex

- Best 12AU7 sub for the money

- smooth, detailed and quiet