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(!!!!!) (Best Pair) JAN-5691 Philips by Sylvania black plates NOS 1984-1985 (2.0/2.2mA and 2.1/2.4mA) (Best 6SL7GT sub) (same internals as 5691 red base) 1-3% matched
(!!!!!) (Best Value Single) JAN-5691 Philips by Sylvania black plates NOS 1985 (2.4/2.6ma) (Best 6SL7GT sub)
(!!!!!) (Best Value Single) JAN-5691 Sylvania black plates NOS 1979 (2.1/2.1ma) (Best 6SL7GT sub)
(!!!!) (Best Pair #1) 6SL7GT Sylvania NOS black plates 1960's same build (2.0/2.0ma and 2.1/2.0ma) 1-3% matched (Eddie Current)
(!!!!) (Best RCA Pair) VT-229=6SL7GT RCA round black plates NOS 1942 (2.8/2.9ma and 2.5/2.6ma)
(!!!!) (Best Single #1) ECC35=6SL7GT Mullard brown base "D" getter halo NOS 1950-1955 era (3.2ma and 3.0ma)
(!!!!) (Best Single 1944) 6SL7GT Sylvania round black plates NOS 1944 (same build as VT-229) (2.1/2.3ma)
(!!!!) (Best Single) 6SL7GT Sylvania NOS branded Zenith 1950's tall bottle (2.9/2.9ma) 1-2% section balance
(!!!!) (Best Single) JAN-CHS-6SL7WGT Sylvania brown base round black plates "D" getter NOS 1959 (2.6/2.6ma) 1% section balance (Highest mA and Gm)
(!!!!) (Recommended Single) JAN-CHS-6SL7WGT Sylvania brown base round black plates "D" getter NOS 1959 (1.9/2.0ma)
(!!!) (Best Value Pair) 6SL7WGT Sylvania brown base round black plates "D" getter halo 1950's (1.8/1.6ma and 1.5/1.4ma)
(!!!) (Good Value Pair) 6SL7GT GE NOS round chrome plates 1969 (1.8/1.9ma and 1.9/2.0ma) (same Gm)
(!!!) (Good Value Pair) 6SL7WGT Sylvania NOS 1970's (2.1/1.6ma and 1.7/1.8ma) 1-5% matched
(!!!) (Recommended Single) 5691 RCA Red Base black plates used/good 1959 (2.3/2.0ma)
(!!!) (Single) 6SL7GT Sylvania round black plates NOS 1950's (2.0/2.3ma)
(!!!) (Slightly microphonic Single) 6SL7GT Ken Rad NOS 1945 era (2.6/2.3ma)
(!!!) (Slightly Microphonic Single) CV1985=6SL7GTY Brimar UK tests like new 1950's (2.2/2.2ma)
(!!!) 6SL7WGT Sylvania brown base round black plates like new 1955 no printing (2.6/2.8ma)
(!!) (Best Pair #2) 6SL7GT Sylvania NOS 1960's -1970 (2.5/2.5ma and 2.7/2.2ma) (Eddie Current) 1-5% section balance
(!!) (Best Tungsol #1) 6SL7GT Tungsol gray ribbed plates NOS 1950's (2.3/2.5ma) (Same Gm)
