Want to add a little warmth to your Classic 30, Classic 50 or Delta Blues? This is our Standard Retube Kit and it contains a matched quad of JJ EL84's for power along with two standard ECC83S's for V1-V2 and a graded high current ECC83S for V3. Just let us know in the comments section if you're looking for max headroom, moderate or an early breakup so we can select a proper grade for the power tubes.