Looking to warm up your GrandMeister 36 or Gramdmeister 40? This is our Standard Retube Kit for the Hughes & Kettner GrandMeister 36 and Grandmeister Deluxe 40 Heads. It uses three ECC83S's with one being current balanced for the phase inverter in V3. The default power tubes are a matched quad of the JJ EL84's.