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Ruby Ruby

Ruby EL34CZ Matched Power Tubes Matched Quad

199.99 $199.99
6-Month Special Financing
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This item is backordered but is available to reserve now. You will not be charged until the item ships.

Style: Matched Quad

Matched Quad $199.99 Matched Pair $99.99
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Update your amp with Ruby replacement tubes

The EL34 is behind the classic “British” amp sound of much classic rock. Used in many Marshall, HiWatt, Orange and other amps, this true pentode power tube delivers tight mids, crisp highs, and a low-end that’s punches, but doesn’t get flabby, for a the iconic rock tones of the late ’60s and early ’70s. Ruby’s exclusive large bottle with gold-plated grid has extra internal anchoring for solid performance. All Ruby power tubes are labeled with precise matching measurements for transconductance and plate current. Matching those parameters ensures long tube life and optimal performance.


  • Large bottle, with gold-plated grid
  • Extra internal anchoring
  • Base labeled with plate current and transconductance
  • Matched parameters for optimal performance and long life
  • 6-month replacement warranty

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Every guitar or bass you purchase from Musician's Friend (electric or acoustic, New or Open Box) includes two years of protection from manufacturer defects.

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