Do you like FAT mids and some extra high end sparkle? This is our ECC803S V1 Option Retube Kit for the Gibson GA 30RVS Combo Amps. It contains a Long Plate ECC803S for V1 along with three ECC83S's with two of them being current balanced for the phase inverters in V3 and V4. The default power tubes are two matched pairs of the JJ EL84's but you can configure this kit to use two matched pairs of the JJ EL844's for an earlier breakup or a pair of the EL84's and a pair of the EL844's by clicking on the "Customize" button!