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. Well, this works really well with the Budda Twinmaster amps too! This kit uses a JJ 5751 for V1 which is in-between an ECC81 and an ECC83S in gain and a current balanced ECC83S for the phase inverter in V2 along with a JJ 5U4GB rectifier tube and a matched pair of JJ EL84's for power. 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.