Want all the gain you can get? This is our High Gain Option Retube Kit for the Engl Gigmaster 30 E305 Heads and E300 Combo Amps. It contains a matched quad of JJ EL84's and a handpicked High Gain ECC83S which is used for both the input and driver tube.
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.