Looking for more warmth and definition? This is our Standard Retube Kit for the Blackstar Artisan 100 Amps. It contains three ECC83S's along with a Matched Quad 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.