AmpRx

AMPRX CREATES PRODUCTS THAT HELP YOU SUPPLY YOUR GEAR WITH THE CORRECT VOLTAGE

BrownBox by AmpRX

Here’s the quick rundown: The BrownBox is an adjustable AC power supply for your amp or tube gear that helps you run your equipment at the optimal voltage. Plug the BrownBox into the wall, adjust the voltage and then plug your gear into the BrownBox.

When a tube amplifier is supplied with the proper line voltage, it will sound and respond as originally intended, revealing the circuit’s true harmonic content, and preventing unnecessary, expensive, and frustrating repairs. BrownBox users testify time and again as to how their amp’s tone, touch and feel have finally come together, providing them with improved harmonics and dynamic amp performance- allowing them to capture the elusive tone they’ve always wanted, every time, everywhere.

The Doc himself included BrownBox (at 6:18) in this great video from Dr Z Amplification about how to make your tubes last longer:

WHAT PEOPLE ARE SAYING ABOUT THE BROWNBOX

My amp (Fender Super Champ) runs cooler now with the voltage down to 106 volts (recently I had to replace blown tubes) and it sounds better. Easy interface. I am happy with the BrownBox!

Chris N., Feb 2023

Built to a high standard and works just as advertised. I look forward to using my Brown Box for a long time and can rest assured that my tubes will have a nice long life as well. Not to mention that my amps can perform at the voltage that they were intended to. Fast shipping and easy easy transaction. Would recommend this product to anyone looking to protect their amps and tubes and get the right voltage and unlock the real potential of their amps!

Alexander H., May 2024

I don’t know how you can build it like that and sell it for what you charge thanks!

Harold L., May 2024