Do you like FAT mids and some extra high end sparkle? This is our ECC803S V1 Option Retube Kit for the Bad Cat Black Cat 30 Heads and Combo Amps. This kit uses a Long Plate JJ ECC803S for V1 to give channel one a real fat tone along with three ECC83S's with one being current balanced for the phase inverter, an EF806 to replace the EF86 and a GZ34 rectifier tube. This will fatten up the tone in the first channel. The default power tubes are a matched quad of the JJ EL84's. With the Customize option you can configure this kit to use the JJ EL844's which will drop the power output a couple decibels (ideal for players wanting decreased headroom/output).