Want the smooth rich tone of the Gold Pin tubes and the earlier breakup of the JJ EL844's? This is our Gold Pin Low Output Retube Kit for the Dr. Z Stangray Heads and Combo Amps. The kit includes a matched quad of JJ EL844's for power to drop the overall output a couple decibels, a JJ GZ34, one JJ Gold Pin EF806 to replace the EF86 and one balanced Gold Pin ECC83S for the phase inverter.