Tubesteader's nod to the Magnatone Super 59!
Magnezium is a meticulously hand-built, two-channel preamp featuring two 12AX7 tubes running at high voltage.
Its circuit draws inspiration from the beloved Magnatone Super 59, a design closely associated with Billy Gibbons.
It combines the silky tones of a Fender amp with the beefy overdriven tones of a Marshall circuit, giving you the best of both worlds!
The low-gain channel delivers a rich bottom end with Bassman-style overdrive, while the high-gain channel adds a Marshall-style gain stage at the front of the circuit: perfect for Southern rock sounds!
Cranking the gain past noon takes you firmly into harmonically rich ZZ Top riffing territory.
A toggle switch on the side of the pedal offers two output modes: a higher output for direct connection to a power amp or a cab sim, and an attenuated mode with a treble cut for connection to the front of an amp.
Positioned at the end of your signal chain, Magnezium pairs beautifully with your favorite cab sim or IR loader, delivering a responsive feel and dynamic tone, thanks to its onboard 12AX7 tubes.
This pedal is as amp-like as they come, responding naturally to your playing dynamics!
Tubesteader Magnezium Preamp features:
• Tube preamp inspired by the beloved Magnatone Super 59.
• Channel 1 controls: Volume, Treble, Mid, Bass, Gain.
• Channel 2 controls: Volume, Treble, Mid, Bass, Gain.
• Tubes: 2 x 12AX7.
• External switching between channels via a 1/8" jack.
• Power: 12V DC.
• Current Draw: 500mA.
• Dimensions: 4.7" X 5.7" X 1.38".
Specs
Type | Preamp, Overdrive |
Condition | New |
Power | 12V DC |
Current Draw | 500mA |
Power supply included | Yes |
Manufacturer Warranty | 5 years |
Country of Origin | Canada |

FREE SHIPPING
- Free shipping within Canada.
- Free shipping to the USA.
- Free shipping on international orders over 520$.
Visit the Shipping page for more.

Fast Delivery
- Canada : 1 - 2 business days
- USA : 1 - 2 business days
- Rest of the world: 3 - 5 business days.

Hassle-Free Returns
You have 45 days to test your new gear. If you choose to return it, we’ll send a full refund. It’s that simple: no bogus restocking fees or charges.
Visit the Returns page for more.
Frequently Asked Questions
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How can I tell if an item is in stock? +
Each product page shows an availability status.
• In stock items are ready to ship.
• Out of stock items are currently unavailable.
You can enter your email to be notified when an item is back in stock.
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Where are you located? +
We’re based in Blainville, Quebec, Canada.
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When will my order ship? +
Orders placed before 12 PM EST ship the same business day.
Tracking details are sent shortly after purchase.
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How much does shipping cost? +
Most orders ship free to Canada and the US.
International orders ship free on purchases over $520 CAD.
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Which shipping methods do you use? +
Orders ship via UPS Expedited by default.
For faster delivery, you can select UPS Express Saver at checkout.
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How long does shipping take? +
Typical delivery times are:
• Canada: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver
• USA: 2–3 business days with UPS Expedited, 1 business day with UPS Express Saver
• International: 3–5 business days with UPS Expedited, 2–3 business days with UPS Express Saver
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Which payment methods do you accept? +
We accept all major credit cards and PayPal.
Financing options are available through Klarna and RBC PayPlan.
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Do Canadian customers pay sales tax? +
Yes. Sales tax is applied based on your province of residence:
• Alberta: 5%
• British Columbia: 5%
• Manitoba: 5%
• New Brunswick: 15%
• Newfoundland and Labrador: 15%
• Northwest Territories: 5%
• Nova Scotia: 14%
• Nunavut: 5%
• Ontario: 13%
• Prince Edward Island: 15%
• Quebec: 14.975%
• Saskatchewan: 5%
• Yukon: 5%
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Do USA customers pay import fees? +
Yes. Starting August 29, 2025, all US-bound shipments will be subject to duties, taxes, and brokerage fees.
These charges are determined by US Customs and collected by UPS at delivery.
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Do international customers pay import fees? +
Yes. International shipments may be subject to duties and taxes.
These charges are set by the destination country’s customs authority and collected by UPS at delivery.