Want a warm lush tone with less grit? This is our Gold pin Option Retube Kit for the Soldano Reverb-O-Sonic Combo Amp. It uses five Gold Pin 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!