AmpRX

AmpRX Brownie Voltage Attenuator

$429.00
$429.00
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Availability:
In Stock
Details

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

Specs

Type Attenuator
Condition New
Power Handling Up to 480W
Manufacturer Warranty Lifetime
Country of Origin United States
Shipping & Returns

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.

FAQ

Frequently Asked Questions

  • 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.

  • Where are you located? +

    We’re based in Blainville, Quebec, Canada.

  • When will my order ship? +

    Orders placed before 12 PM EST ship the same business day.

    Tracking details are sent shortly after purchase.

  • How much does shipping cost? +

    Most orders ship free to Canada and the US.

    International orders ship free on purchases over $520 CAD.

  • Which shipping methods do you use? +

    Orders ship via UPS Expedited by default.

    For faster delivery, you can select UPS Express Saver at checkout.

  • 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

  • Which payment methods do you accept? +

    We accept all major credit cards and PayPal.

    Financing options are available through Klarna and RBC PayPlan.

  • 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%

  • 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.

  • 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.

Reviews

Customer Reviews

Based on 3 reviews
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J
Jeffrey Levitt
AmpRX Brownie

Excellent product. Built like a tank. Easy to use and it does the job as described. My wall voltage varies from 121 to 125, as such, the Brownie is a big help keeping my modern amps in the sweet spot.

J
John Drew
Love my Brownie

Works great, built like a tank and hopefully keeps my Ampliphonics and Gain amp in tip top shape also purchased from you.

K
Keith
Perfect For Home

This little box is great for home. Wanted the Brownie as I don’t own any vintage amps but just wanted to regulate wall voltage and have the ability to regulate up if needed (which would be rarely, if ever). My wall voltage tests regularly at 125v. Five notch adjustments with the Brownie and we’re good. I run a small power bar into the Brownie for the amps and pedal power. The compact size makes it great for home use as well.

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