This is our Tweed Option Retube Kit for the Ampeg Reverberocket R-12R & R-212R Reissue amps. It contains a JJ 12AY7 for V1 and two ECC83S’s with one being current balanced for the phase inverter in V3. The Tweed Option will drop the gain down a bit more than the SRV Option allowing you to get more power tube breakup at higher volumes. The JJ 12AY7 has a fat warm tone with a big shimmering sparkle in the high end! 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!