Guitar and Bass Amplifier Tubes

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  • Mesa/Boogie SPAX7 Preamp Vacuum Tube
    Item # AM190
    | Mfg # 750151F
    | UPC # 809404091917
    MESA SPAX7 preamp tubes are a super-premium grade substitute for any 12AX7 positions - They are a "Special Requirement Preamp Tube" that possess an even higher standard of overall performance, due to their incredibly low sensitivity to microphonic noise - This is the ultimate preamp tube to use in all critical gain stage positions - It is the absolute best of the best!
  • Mesa/Boogie 12AX7 Premium Grade Preamp Tube
    Item # AM767
    | Mfg # 750150F
    | UPC # 809404004597
    MESA 12AX7's are premium grade preamp tubes that provide the maximum level of high gain output and overall tonal quality with unsurpassed consistency and reliability - They possess a smooth and balanced response across the tonal spectrum and are extremely lively, open and expressive.
  • Mesa/Boogie EL-84 / 6BQ5 Russian Premium Grade Vacuum Tubes, Matched Pair
    Item # AM188
    | Mfg # 750606D
    | UPC # 809404004672
    The MESA EL-84 / 6BQ5 is the little brother to the EL-34 and is the classic European designed tube that lead the British invasion - Our EL-84 is tight and aggressive, yet smooth and warm, with an amazing chiming mid and top end - Brilliant focus with a frequency response that always brings your guitar to the front of the mix - This tube is true to its classic roots and is extremely consistent and reliable.
  • Mesa/Boogie 5AR4/GZ34ACF Rectifier Tube, Premium Grade Vacuum Tube
    Item # AM770
    | Mfg # 750504F
    | UPC # 809404004634
    The MESA 5AR4 rectifier tube produces a vintage feel with light to mild "sag" - While it produces more "sag" than Silicon Diodes, it is the least "saggy" of our tube rectifier offerings (The Rectifier is part of the Power Supply and its purpose is to convert AC into DC).
    ONLY 6 IN STOCK
  • Mesa/Boogie 5U4G Rectifier Tube, 750540F
    Item # AM793
    | Mfg # 750540F
    | UPC # 809404004641
    The MESA 5U4G rectifier tube is a classic 1930's "Coke Bottle" design - It produces a flexible, elastic feel that is a bit more controlled and slightly less "saggy" than our new 5U4GB - It has a nice spongy feel but has moderate life expectancy and reliability compared to our new 5U4GB - Due to its tall "Coke Bottle" design, this tube may not fit in all amplifiers - Please confirm the height between the amp chassis and the cabinet before choosing...
    ONLY 3 IN STOCK
  • 3 3/4" from bottom of base to top of glass. The MESA 5U4GB rectifier tube is our very best overall 5U4 and our tube of choice in the production of all new Mesa amps featuring this tube - Based upon classic 1950's technology, the 5U4GB is a vastly improved 5U4 design that is extremely reliable and consistent, as well as much more compact - It is basically the size of a 6L6 power tube, so please take special care to install them in the correct tube...
    ONLY 1 IN STOCK, USUALLY SHIPS IN 3 DAYS
  • Mesa/Boogie 5Y3 Rectifier Tube, Premium Grade Vacuum Tube
    Item # AM763
    | Mfg # 750770F
    | UPC # 809404004719
    The MESA 5Y3 is a true, authentic 5Y3 NOS (New Old Stock) equivalent modeled after the original Phillips 5Y3 and is built to our exacting specification for use in our Lone Star Special - This tube produces a sultry vintage sag, creating a silky, smooth feel on the strings and provides the most sag of all of our rectifier tubes.
    ONLY 1 IN STOCK
  • The MESA EL-34 STR-447 is our very best overall EL-34 - It is a premium grade, NOS (New Old Stock) equivalent and our tube of choice in the production of all new Mesa EL-34 powered models - It has a traditional EL-34 tone & feel that is very urgent and aggressive and is an excellent choice for all styles of gain, especially classic rock, alternative rock & metal - This tube is true to the crown with focused low end, crushing mid range cru...
    ONLY 1 IN STOCK
  • Mesa/Boogie 6L6 STR-440 Duet (matched pair) Premium Grade Vacuum Tubes
    Item # AM185440
    | Mfg # 750618D
    | UPC # 809404004702
    The MESA 6L6 STR-440 is our very best overall 6L6 - It is a premium grade, US equivalent and our tube of choice in the production of all new Mesa 6L6 powered models - Remarkable bass definition, articulate mids and shimmering highs keep every note amazingly intelligible, with a smooth, creamy character - Premium structural quality provides exceptional consistency and reliability - Rivals NOS (New Old Stock) durability and sonic character - Amazin...
    0 IN STOCK, EXPECTING MORE SOON
  • Mesa/Boogie Siemens NOS EL-34 STR-450 Tubes, Duet (matched pair)
    Item # AM790
    | Mfg # 750609D
    | UPC # 809404004689
    The MESA EL-34 STR-450 is an actual German made, "A" grade NOS (New Old Stock) Siemens EL-34 - This legendary European EL-34 is known for its unsurpassed "bell-tone" clarity and touch sensitive sustain & articulation - Premier German engineering provides unsurpassed structural quality that makes this one of the most toneful, consistent and reliable EL-34's you can buy - This is a final chance to own a real authentic EL-34 classic - Quantities...
    0 IN STOCK, EXPECTING MORE SOON
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