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Axiom series transformers are in a class by themselves. We’ve taken our advanced knowledge of modern transformer designs and mated it with our unparalleled expertise with vintage gear.

  • MMO-100M

    Marshall | 100 Watt | Output Transformer

    Optimized for 6L6 / KT88 / 6550 tubes — 1.5″ stack. Uses Grain-Oriented Iron

    $292.00
  • MM-9H-CH

    Mercury, Orange | MISC., Tiny Terror | Choke

    9 Henry Mini-Choke

    $48.00
  • O50JM-MM

    Marshall | 50 Watt | Output Transformer

    Plexi — KT88 / 6550 & 6L6 tubes

    $228.00
  • P50JM-475-C

    Marshall | 50 Watt | Power Transformer

    360-0-360VAC unloaded B+ — 6.3V CT @ 7A — Added 13V @ 1.5A Accessory Winding — With Universal Voltage Primary

    $308.00
  • M-JMP-1-P

    Marshall | JMP-1 | Power Transformer

    JMP-1 — Drop-in Upgrade! — NOT FOR MODDED UNITS! — Universal Voltage Primary

    $223.00
  • O100-PLM

    Marshall | 100 Watt | Output Transformer

    Plexi — 3100Ω primary impedance — 1.5″ stack

    $313.00
  • TT-KIT

    Orange | Tiny Terror | KIT

    It’s our simplest Upgrade Kit, yet. All you (or your amp tech) do is swap the transformers and make a few minor circuit mods. The kit also includes an optional Pentode/Triode mode selector switch that expands the tonal possibilities even more!

    Also included in the kit:
    – Axiom Power Transformer
    – Axiom Output Transformer (4, 8, 16 Ohm Taps)
    – Other parts necessary to make the upgrade
    – Fully illustrated step-by-step color manual, with wiring schematics and instructions

    Also consider adding our 9 Henry Mini-Choke for a big affect on the overall tone and feel of your amp.

    Available in 120V only. At this time export versions are not available. Amplifier not included.

    $335.00
  • MAR-JVM100-O

    Marshall | 100 Watt, JVM | Output Transformer

    JVM410 Head — Check out the JVM Forum! — Upgrade!

    $302.00
  • O50-PLM

    Marshall | 50 Watt | Output Transformer

    6K primary

    $255.00
  • C600-KIT

    Fender | Champion "600" | KIT

    Mercury’s kit has everything you need to upgrade your Reissue Fender Champion 600 amp including detailed step-by-step, full color, illustrations, schematics and photographs to help guide you through the process. Installing our Mercury Upgrade Kit dramatically transforms your Reissue Fender Champ “600” (or Gretsch Electromatic) into a keeper.

    Included in the kit:
    – Axiom Power Transformer
    – Axiom Output Transformer
    – Axiom Mini-Choke™
    – Other parts necessary to make the mod
    – Fully illustrated step-by-step color manual, with wiring schematics and instructions

    Note: Speaker no longer included.

    Available in 120V only. At this time export versions are not available. Amplifier not included.

    $275.00
  • AC4-KIT

    VOX | AC4TV | KIT

    Whether you use your VOX AC4tv for practice, gigging or recording, take it to the pro-level with the Mercury Studio-Pro Upgrade. Experience the lush vintage tones that only Mercury transformers can give your amp.

    Included in the kit:
    -Axiom Power Transformer
    -Axiom Output Transformer
    -Axiom Mini-Choke™
    -Other parts necessary to make the upgrade
    -Fully illustrated step-by-step color manual, with wiring schematics and instructions

    Kits are available in 120V only. Amplifier not included.

    $345.00
  • EPJR-KIT2

    Epiphone | Valve Jr. | KIT

    Upgrade Kit for the remarkably inexpensive Epiphone Valve Jr. amp (combo or head). This demonstration Upgrade Kit features high-end, pro-quality performance transformers like those in great-sounding amps costing anywhere from hundreds to thousands more. Our Upgrade Kit makes the modified Valve Jr. the lowest-cost introduction ever to the wonderful world of boutique amplifier tone.

    Ever wonder how much better your amp could sound just by upgrading its transformers? Here’s your chance to discover the night and day difference.

    Included in the kit:
    – Axiom Power Transformer
    – Axiom Output Transformer (4, 8, 16 Ohm Taps)
    – Axiom Mini-Choke™
    – Other parts necessary to make the mod
    – Fully illustrated step-by-step color manual, with wiring schematics and instructions
    – BONUS! The “6V6 Mod.” Takes your Valve Jr. to even greater heights! Retrofits a 6V6 tube into the circuit. Allows you to run the EL-84 and 6V6 separately or in tandem.

    Available in 120V only. At this time export versions are not available. Amplifier not included.

    $345.00
  • FC4

    Fender | Bandmaster, MISC., Pro, Super, Tremolux, Twin | Choke

    Tweed — 4 Henry. Uses Grain-Oriented Iron

    $64.00
  • M-88BASS-250-OM

    Mercury | MISC. | Output Transformer

    Custom design for bass guitar applications — 2, 4 & 8Ω taps — 1500Ω primary — 3″ stack of iron. Uses Grain-Oriented Iron

    $424.00
  • TW-KF-OT

    Trainwreck | MISC. | Output Transformer

    Dual primary — 5200Ω and 6600Ω — 4, 8 & 16Ω taps — Upgrade!

    $297.00
  • MAR100-P

    Marshall | DSL / TSL 100 | Power Transformer

    DSL/TSL — Drop-in Upgrade! SuperStack (over 4 inches of iron!)

    $345.00
  • OR-DT-O

    Orange | 15 Watt | Output Transformer

    Dual Terror — 4, 8 & 16Ω taps — Drop-in Upgrade!

    $228.00
  • SE-5K-M

    Mercury | MISC. | Output Transformer

    Single Ended 5k primary — 4, 8 & 16 Ohm Secondary taps

    $138.00

Not finding what you’re looking for? We are constantly adding new products to our catalog – for the most up-to-date information, please email or call us: 818-998-7791.

Mercury offers Transformer Restoration Services for rare and vintage transformers that are failing or underperforming. With our attention to detail you can be assured that your restored vintage transformer will look AND sound exactly as it did. For more info please email or call us: 818-998-7791 for a quote.