It's no secret that 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 5751 for V1 which is in-between an ECC81 and an ECC83S for V2 along with a Matched Pair of our special Double Mica JJ 6L6GC's for the power section but you can configure this kit to use the JJ 5881's for a reduction in power by clicking on the "Customize" button.