Looking for a vintage vibe with FAT mids and a real sparkle? This is the ECC803S V1 Option Retube Kit for the Hughes & Kettner TubeMeister 18 Heads and Combo Amps. It uses a Long Plate ECC803S in V1 and a current balanced ECC83S for the phase inverter in V2. The default power tubes are a matched pair of the JJ EL84's.