Premier Guitar features affiliate links to help support our content. We may earn a commission on any affiliated purchases.

AmpRx Unveils the Brownie Voltage Controller

AmpRx Unveils the Brownie Voltage Controller

With flexible voltage adjustments, precise control, customizable protection, compact design, and affordable pricing at $299, the Brownie is the ultimate solution for optimizing tone and safeguarding your gear.


AmpRx, the trusted name behind the industry-renowned BrownBox, has unveiled its newest innovation: The Brownie, a voltage-optimizing power supply for modern amps and the first of its kind.

Designed by AmpRx co-owner and CEO Cassandra Sotos (2024 NAMM Female Entrepreneur of the Year), the Brownie provides unparalleled control, flexibility, and protection specifically for modern tube amplifiers by allowing the player to both increase and decrease voltage with volt-by-volt precision.

Priced at $299, the Brownie offers an affordable and essential solution for protecting your investment in your high-quality tube amp. It allows you to optimize your tone and safeguard your gear from variations in voltage by givingthe ultimate advantage: knowing exactly what youā€™re feeding your amp.

Known as the secret weapon of touring professionals, AmpRx products have been spotted on stage with bands like the Red Hot Chili Peppers, Lynyrd Skynyrd, Zac Brown Band, Iron Maiden, and many more. AmpRx is now bringing its game-changing technology to an even broader audience with this compact, affordable, and versatile product. Try the Brownie for yourself and discover exactly why artists, amp designers, and technicians rely on AmpRx to provide consistent sound, performance, and extend the life of their gear.

The Brownie will be available January 20th, 2025, presented at NAMM Global Media Day and on display at Booth #5630.

WHAT MAKES THE BROWNIE SPECIAL? Building on the success of the flagship BrownBox, the Brownie offers key innovations tailored for modern amplifiers:

  • Flexible Voltage Adjustments: The Brownie is the first in the AmpRx line to both decrease and increase voltage, providing optimal performance for modern tube amps (often at 117-120V).
  • Precise Control: Adjust voltage in ultra-precise -1V increments when decreasing, and by +3V or +5Vwhen increasing, allowing musicians to fine-tune their tone with precision.
  • Customizable Protection: The Brownie ensures safe operation, putting control directly in the player's hands, and includes two fuse options: 2A for smaller setups and 4A for larger setups, ensuring compatibility with diverse gear.
  • Compact and Portable Design: Smaller and lighter than the original BrownBox, the Brownie is perfect for musicians seeking portability, durability, and streamlined functionality. It can even fit on a pedalboard or in a backpack.
  • Wide Accessibility: At just $299, the Brownie offers professional-grade voltage control at a price point thatā€™s accessible to musicians everywhere.

Email sales@brownbox.rocks to order and stop by NAMM Booth #5630 to see the Brownie in action, talk with the owners, team and artists, and see exactly why so many people insist onAmpRx products when they make music.

For more information, please visit brownbox.rocks.

A dose of magic gain potion.

Works like a little vial of magic gain potion. Fattens without obscuring individual frequency bands.

None.

$129

Solodallas SVDS Boost
solodallas.com

5
4.5
5
4.5

The Schaeffer-Vega Diversity Systemā€”an early and very successful wireless systemā€”excelled at the tasks it was designed for. But there was more magic than met the eye. Though designed to sound as transparent as possible, it nonetheless colored the signal in a way that people like Angus Young and Eddie Van Halen found essential.

Read MoreShow less

Positive Grid's Spark NEO offers guitarists a wireless guitar rig built into premium headphones, with AI-powered tone customization, exceptional sound quality, and versatile connectivity.

Read MoreShow less

Neil Youngā€™s ā€™70s hits are some of the most recognizable radio rock jams of all time. But Neilā€™s guitar playing continued to grow over the ensuing decades, as he traversed styles from blues to country to electronic to rockabilly and beyond, eventually developing one of the most tonally decadent, fully formed improvisational voices in the entire guitar universe.

Read MoreShow less

This Japan-made Guyatone brings back memories of hitchinā€™ rides around the U.S.

This oddball vintage Guyatone has a streak of Jack Kerouacā€™s adventurous, thumbing spirit.

The other day, I saw something I hadnā€™t noticed in quite some time. Driving home from work, I saw an interesting-looking fellow hitchhiking. When I was a kid, ā€œhitchersā€ seemed much more common, but, then again, the world didnā€™t seem as dangerous as today. Heck, I can remember hitching to my uncleā€™s cabin in Bradford, Pennsylvaniaā€”home of Zippo lightersā€”and riding almost 200 miles while I sat in a spare tire in the open bed of a pickup truck! Yes, safety wasnā€™t a big concern for kids back in the day.

Read MoreShow less