This kit is for those of you who want more drive and sustain from the front end. These will not hurt your clean tone but as you dial in gain you will just get a bit more. A matched pair of JJ EL84's, two handpicked high gain ECC83S's for V1 and V2 and a high gain balanced ECC83S for the phase inverter in V3. 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.