Is the sweet spot for your Mazerati just a little to loud for you? This is our Low Output Standard 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 standard JJ ECC83S for V1 and a current balanced 5751 for the phase inverter in V2.