Vox AC30 Standard Tube Set, JJ Tubes (x4 EL84, x3 12AX7) Vox AC30 Tube Set - JJ Tubes (EL84 x4, 12AX7 x3) Tubes are JJ brand Power tubes are Apex Matched Includes: x4 EL84-JJ, x3 12AX7-S-JJ Buy the set and save!