(!!!!!) (Best Overall Pair) EF806S Telefunken Germany <> bottom NOS 1966 same date codes (3.1ma and 3.1ma) 1% matched
(!!!!!) (Best Pair) 7N7 Sylvania branded GE and RCA chrome top NOS 1955-1956 same build (8.4/8.4ma and 7.9/8.3ma) (same Gm)
(!!!!!) (Best Pair) EF806S Telefunken Germany <> bottom NOS 1966 same date codes (3.0ma and 3.0ma) (Neumann, Lawson) 1% matched
(!!!) (Recommended Single) 2A3 RCA black plates NOS 1945 era (120ma)
(!!!) (Recommended S