The Brownie is a voltage optimizing power supply designed specifically for modern tube amplifiers, offering the ultimate solution for achieving consistent tone and protecting valuable equipment - the first of its kind. The Brownie is the first product in the AmpRx line to increase and decrease voltage. 

WHAT MAKES THE BROWNIE SPECIAL? 

Modern Versatility: The first product in the AmpRx line to both decrease and increase voltage, compatible with all amplifier types from classic tube amps to modern designs. 

Unlock the Perfect Tone: Achieve consistency in tone and protect gear in any environment by dialing in the voltage you need every time you power your amp. Love your tone at 117V? You got it. 

Serious Protection: Mitigate disaster. Prevent unnecessary, expensive, and frustrating repairs. 

Industry Recognition: AmpRx is trusted by amp techs around the world, top touring artists and their techs, and has been spotted on stages with artists like the Red Hot Chili Peppers, Paramore, Bonnie Raitt, Derek Trucks, Iron Maiden, Lynyrd Skynyrd and more. 

Reliable and Durable: Hand-wired by humans in the USA, built to last. 

TECHNICAL SPECIFICATIONS 

• Input: 120V/50-60Hz, standard IEC AC cable 
• Output: One (1) AC grounded outlet 
• Voltage Adjustment Range: 
• Decreasing Increments: -1V (-7V Max Reduction)
• Increasing Increments: +3V, +5V 
• Fuses: 2A and 4A options included 
• Max Connected Load: 4A/480W (when paired with 4A Fuse) 
• Weight: 2.8 lbs 
• Dimensions: 5(3/4)"L x 4"W x 4(1/8)”H 
• Construction: Rugged metal enclosure; Powder coated in the USA