(!!!!) (SINGLE) 12AU7A GE NOS 1972 copper grid posts (10.6/9.8ma) (warm and smooth)

1 low noise tube) 12AU7A GE NOS 1972 (RF) (warm / smooth / sweet sound, not bright)

1 section) 10.6ma Gm=2200

1 section) 9.8ma Gm=2100

Tested on Amplitrex

– Unison Research

– Head-Direct EF1 preamp

– Allen & Heath VF-1 compressor

– Ray Samuels

– Eastern Electric DAC

– Lexicon Signature 284

– Bravo