Looking for a nice upgrade in tone? This kit for the Mini Rec uses a matched pair of the JJ EL84's for power along with four standard ECC83S and a balanced ECC83S for the phase inverter for a warmer and sweeter tone. 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.