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 the input tube which is in-between an ECC81 and an ECC83S in gain, a standard ECC83S for V2 and a matched pair of JJ EL84's for the power section. Just let us know in the comments section if you're looking for an early breakup, a moderate breakup or a later breakup for more headroom in which case we will choose the coolest grades we have available for the power tubes.