Looking for a more vintage tone with FAT mids and a sparkling high end? This is our ECC803S 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 standard Long Plate ECC803S which is used for both the input and driver tube. A nice upgrade from the stock tubes, sweet and warm!
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.