Is the sweet spot for your Stang just a little to loud for you? This is our Standard 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 EF806 to replace the EF86 and one balanced ECC83S for the phase inverter.