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.

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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.

  • 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.
  • Manufactured In Russia
  • Matched Quad

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