This is the Low Output Normal clean / High gain lead Retube Kit with an ECC803S for V1. This Retube Kit contains an ECC803S for V1 for a little less gain, a thicker mid and a little more high end. We follow that up with a high gain ECC83S for V2 which gives the OD channel as much attitude as possible. We finish it off with a graded high current ECC83S for V3 and a matched quad of JJ EL844's for power (which drop the output a couple decibels).