Looking to warm up your HR50+? This is our Standard Retube Kit for the Soldano Hot Rod 50 Plus. It uses five ECC83S's with one being current balanced for the phase inverter in V5. The default power tubes are a matched pair of the JJ 6L6GC's but you can configure this kit to use the JJ KT66's or JJ 5881's to drop the power output a couple decibels by clicking on the "Customize" button!