Looking for more warmth and definition? This is our Standard Retube Kit for the Blackstar Soloist 60 Amps. It contains two ECC83S's for V1 and V2 along with a Matched Pair of JJ E34L's for the power section but you can configure this kit to use the JJ EL34II's, EL34’s, KT77’s or Big Bottle 6CA7’s by clicking on the "Customize" button.