JJ Gold Pin 5751 with fully balanced triodes. If you need pairs or multiples of this tube matched to each other use this option. These tubes have symmetrical performance between triodes and are ideal where total consistency and repeat-ability from tube to tube is desired. The 5751 is a great 12AX7/ECC83 substitute for users that desire a bit less gain. All Gold Pin tubes feature internal components that have been selected off the assembly line and treated differently during the final construction process.