(!!!!!) (Best Overall Pair) 5691 RCA red base gray plates 1967-1968 (2.3/2.3ma and 2.2/2.5ma) 1-3% matched
(!!!!) (Best 5691 Single) 5691 RCA Red Base NOS 1950's rebranded WL-5691 Westinghouse 1960 (2.2/2.3ma) 1-2% section balance
(!!) (Best Value Single) 5691 RCA red base gray plates NOS 1975 (1.9ma/2.5ma)
(!!) (Best Value) 5691 RCA Red Base black plates used/good 1955 (1.7/1.8ma)
(!!) (BEST VALUE) 5691 RCA Red Base gray plates low hours/tests like new 1966 - broken center guide pin (2.5/2.6ma) 1-2% section balance
