 | 6L6WXT+, Sovtek Higher in gain than the 5881WXT, with full base. Available in Singles, Matched Pairs or Matched Quads - please select from list. | Varies by Option More Details |
 | 7591, JJ Octal power tube (Max Plate Watts = 19W) | Varies by Option More Details |
 | KT88, JJ, Blue Glass JJ Electronic KT88 - Blue Glass Available in Singles, Matched Pairs, Matched Quads or Matched Sextets - please select from list. | Varies by Option More Details |
 | E34L, Burned In, JJ Electronics JJ Electronic E34L - Burned-In Available in Singles, Matched Pairs or Matched Quads - please select from list. | Varies by Option More Details |
 | E34L Matched Pair, Groove Tubes Octal power tube (Max Plate Watts = 25W) | $49.00 More Details |
 | KT88 - Sovtek Sovtek KT88 Available in Singles, Matched Pairs, Matched Quads and Matched Sextets - please select from list. | Varies by Option More Details |
 | 6550A Valve Art Octal power tube (Max Plate Watts = 42W) | Varies by Option More Details |
 | KT88, Electro-Harmonix Electro-Harmonix KT88 Vacuum Tube High power kinkless-tetrode for use in amplifiers such as the Marshall Major. This tube is a favorite of audiophiles. Can be used in place of 6550 for a more "round" bass signature. | Varies by Option More Details |
