Optimize your amp’s power, protect your tone!
The AmpRx Brownie is a versatile voltage optimizer designed to ensure your tube amplifier performs at its best.
Whether you’re gigging, recording, or practicing, the Brownie helps you achieve consistent power—vital for both tone and amp longevity.
While 120 volts is the standard for American outlets, real-world conditions rarely deliver a perfect supply.
Older homes, studios, and venues often fall short, affecting your amp’s response and lifespan.
The Brownie solves this by letting you adjust wall voltage both downward (up to -7V) and upward (+3V and +5V), ensuring your amp receives a stable 117–120 volts in almost any setting.
Its high-visibility LCD provides real-time voltage and amperage readings, so you’ll always know what your amp is getting.
Recording professionals and engineers worldwide trust the Brownie to extend the life of vintage amps while helping modern rigs find their tonal sweet spot.
Beyond protection, the Brownie is a tone enhancer. Running your amp at its intended voltage ensures optimal dynamics, responsiveness, and clarity—without guesswork.
AmpRX Brownie Voltage Attenuator features:
• State-of-the-art voltage optimizer for vintage and modern tube amplifiers.
• Quick installation for immediate voltage adjustments (+5V to -7V range).
• Real-time voltage and amperage monitoring via high-visibility LCD.
• Safeguards your amp from damage caused by voltage fluctuations.
• Enhances tone by providing consistent, manufacturer-recommended power.
• Compact, durable design.
• Dimensions: 4.12" x 4.00" x 5.75".
Specs
| Type | Attenuator |
| Condition | New |
| Power Handling | Up to 480W |
| Manufacturer Warranty | Lifetime |
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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Q : Is this item in stock? +
A : On product pages, you can find an availability status.
Products with the mention 'In stock' are in stock and ready to ship.
Products with the mention 'Out of stock' are not currently in stock.
For out of stock products, you can ask to get notified as soon as the item is back in stock.
Enter your email in the ‘Email me when available’ field and you’ll be kept in the loop.
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Q : Where are you located? +
A : We’re in Blainville, Quebec, Canada.
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Q : When will my order ship? +
A : Orders placed before 2PM EST ship on the same business day.
An update with tracking details will be sent shortly after purchase.
(Please note: business days don’t include weekends and holidays)
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Q : How much does shipping cost? +
A : Shipping to Canada and the USA is free on most orders.
Shipping to the rest of the world is free on orders over $520 CAD.
Visit the Shipping page for more infos.
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Q : What shipping method do you use? +
A : Orders ship via UPS Expedited by default.
For faster delivery, UPS Express Saver can be selected at checkout.
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Q : What payment methods do you accept? +
A : We accept major credit cards and PayPal.
Financing options are also available through Klarna or RBC PayPlan.
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Q : Do you charge sales taxes to Canadians? +
A : Canadian residents are asked to pay sales taxes:
Alberta: 5%.
British Columbia: 5%.
Manitoba: 5%.
New Brunswick: 15%.
Newfoundland and Labrador: 15%.
Northwest Territories: 5%.
Nova Scotia: 15%.
Nunavut: 5%.
Ontario: 13%.
Prince Edward Island: 15%.
Quebec: 14.975%.
Saskatchewan: 5%.
Yukon: 5%.
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Q : Are there import charges on international shipments? +
A : Our prices do not include duties or taxes.
Customers outside of Canada are responsible for duties and taxes.
To estimate potential import fees, please consult a duty cost calculator.