Want the smooth rich tone of the Gold Pin tubes and the earlier breakup of the JJ EL844's? This is our Low Output Gold Pin Option Retube Kit for the Dr. Z Mazerati. It contains a matched quad of JJ EL844's for power to drop the overall output a couple decibels, a JJ GZ34 rectifier tube, a Gold Pin JJ ECC83S for V1 and a current balanced Gold Pin 5751 for the phase inverter in V2.