Stevie played his amps cranked and preferred a little cleaner sound from the front end allowing you to hear more power tube breakup. This kit uses a JJ Electronic 5751 for V1 which is in-between an ECC81 and an ECC83S in gain, a current balanced ECC83S for V2. A real nice combination! The default power tubes are a matched pair of the JJ Electronic E34L’s but you can configure this kit to use the JJ EL34II's, EL34’s, KT77’s, Big Bottle 6CA7’s by clicking on the "Customize" button.