Do you like FAT mids and some extra high end sparkle? This is our ECC803S V1 Option Retube Kit for the Bad Cat Hot Cat 30R Amps. It uses a Long Plate ECC803S for V1 along with six ECC83S's with one being current balanced for the phase inverter and a GZ34 rectifier tube. The default power tubes are a matched pair of the JJ Electronic E34L's but you can configure this kit to use the JJ EL34II's, EL34’s, KT77’s or Big Bottle 6CA7’s by clicking on the "Customize" button!