Looking to warm up your R12R or R212R? This is our Standard Retube Kit for the Ampeg R12 and R212R Reverberocket heads and Combo Amps. It uses three ECC83S's with one being current balanced for the phase inverter in V3. The default power tubes are a matched pair of the JJ 6L6GC's but you can configure this kit to use the JJ 5881's or even the JJ 6V6S's to drop the power output a couple decibels by clicking on the "Customize" button!