AmpRx BrownBox Guitar Amp Voltage Attenuator 120V

Retailing in the region of £449.00

If you are looking for New gear from AmpRx Amps. The AmpRx BrownBox Guitar Amp Voltage Attenuator 120V is a great option. In stock, and ready to ship with fast, reliable delivery across the UK, Ireland, and Europe. For more details within Amps, additional Combo Amps options, full specifications, demos, images, videos, and secure online ordering, read on below.

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Description

If you are looking for New gear from AmpRx Amps. The AmpRx BrownBox Guitar Amp Voltage Attenuator 120V is a great option. In stock, and ready to ship with fast, reliable delivery across the UK, Ireland, and Europe. For more details within Amps, additional Combo Amps options, full specifications, demos, images, videos, and secure online ordering, read on below.

In the United States, you should be receiving 120V AC from the wall. But depending on where you are and what time of day it is, you can receive anywhere from 120V to 129V. That’s not good for your amplifier, or your ears. The AmpRx BrownBox is an adjustable AC power supply (a voltage controller) for your amp or tube gear that helps you run your equipment at the optimal voltage. Just plug the BrownBox into the wall, adjust the voltage and then plug your gear into the BrownBox. Simple!

Depending on the amplifier, a BrownBox user might discover that modern gear runs optimally at 116-118V, or as low as 108-110V for vintage gear. It’s impossible for an amplifier designed for 110V or 120V to sound or operate anywhere near the way it should at 129V.

The BrownBox features flexible voltage reduction options that let you bring your power input down to an optimal level, resulting in significantly improved amplifier performance.

Please note that the AmpRx BrownBox is only compatible with amplifiers from the US.

Key Features

  • 120 Volt AC, 50/60 Hz, 5 Amp Voltage Attenuator supplies up to 540 Watts, designed for small or mid to larger sized amplifiers (i.e. Fender Deluxe/Bassman/Twin, Marshall 50w/100w, Vox AC30). Can also be used for parallel or dual amp rigs.
  • Easy to read back-lit LCD display enables real-time voltage and amperage monitoring (also useful for diagnostics).
  • Two adjustment modes to help to fine-tune your voltage.
  • Proprietary transformer design wound exclusively for use with tube amplifiers, an industry first.
  • Equal or attenuated voltage output and a 5 amp fuse with in-rush current protection ensures that you’ll never accidentally overload your amplifier.
  • Powder-coated EMF neutral housing and tough road rugged construction.
  • Silent, cool operation.

Specifications

  • Input: 120VAC, 50/60 Hz; Standard IEC AC Cable
  • Output: Two AC Grounded Outlets, Adjustable Voltage Reduction
  • Power Handling: 5 Amps at 120VAC, 50/60 Hz, up to 540 Watts
  • Dimensions (L x W x H): 7.5 x 4.5 x 4.875 inches
  • Weight: 3.6 lbs.

Additional information

Weight 1 kg

About the manufacturer

AmpRx

More info about this Product

Amps

Guitar amps cover everything needed to amplify, shape, and project your guitar sound, from small practice setups to full stage and studio rigs. In this category you’ll find combo amps, separate amp heads and speaker cabinets, covering valve, solid-state, and hybrid designs, each offering a different feel and response. You’ll also see modelling and digital amps, built-in effects, footswitches, attenuation solutions, replacement speakers, valves, and essential accessories to keep an amp performing at its best. Whether you’re chasing pristine cleans, classic crunch, or modern high-gain tones, guitar amps and related gear are all about finding the right balance of power, tone, and control for the way you play.

Combo Amps

Combo amps combine an amplifier and speaker into a single, self-contained unit, making them a practical and popular choice for many players. They’re easy to transport, simple to set up, and available in a wide range of power ratings, from small practice amps to powerful stage-ready models. Combo amps come in valve, solid-state, hybrid, and digital designs, often with built-in effects and tone controls. Their all-in-one nature makes them ideal for home use, rehearsals, recording, and live performance where convenience and reliable tone matter.

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