Like FAT mids and a sparkling high end? This is the ECC803S V1 Option Retube Kit for the Dr. Z Maz 8 Head and Combo Amps. It contains a single JJ EL84 for power, a GZ34 rectifier tube, one JJ ECC81, one Long Plate ECC803S for V1 along with three JJ ECC83S's. Just let us know in the comments section if your looking for max headroom, moderate or an early breakup so we can select a proper grade for the power tube.