
The Original BrownBox
Input: 120VAC, 60 Hz; Standard IEC AC cable
Output: Two AC Grounded Outlets, Adjustable Voltage Reduction
Power Handling: 5 Amps at 120VAC, 60 Hz, up to 540 Watts
Today, we 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. Depending on the amplifier, a BrownBox user might discover that modern gear runs optimally at 116-118V. 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 reductions options that let you bring your power input down to an optimal level, resulting in significantly improved amplifier performance.

The Brownie
Input: 120V/50-60Hz, standard IEC AC cable
Output: One AC Grounded Outlet
Adjustable Voltage Reduction: 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: 5¾”L x 4”W x 4⅛”H
Construction: Rugged metal enclosure; Powder coated in the USA
Today, we 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. Depending on the amplifier, a Brownie user might discover that modern gear runs optimally at 116-118V. It’s impossible for an amplifier designed for 110V or 120V to sound or operate anywhere near the way it should at 129V.
KEY FEATURES
Designed for Modern Amplifiers: The first product in the AmpRx line to both decrease and increase voltage, designed specifically for modern amplifiers.
Precise Control: Adjust voltage in ultra-precise -1V increments when reducing voltage (up to -7V total) and up to +5V in +3V and +5V increments when increasing. In almost any situation, you can dial in 117-120V.
Flexible Fuse Options: 2A for smaller amps, 4A for larger amps. Your choice.
Compact and Portable: Smaller and lighter than the original BrownBox, making it easy to transport for gigs, studios, and home use.
Price: At $299, the Brownie is an affordable option for musicians seeking professional-grade voltage control.
Hand Built for Reliability: Hand-wired by humans for durability and performance.

THE BROWNBOX II (Legacy)
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
All the goods as The Original BrownBox, but made for 120VAC at 50/60 Hz when powering American amps in 120V countries or with a stepdown transformer overseas
WHY WOULD YOU NEED A BROWNBOX II?
If you’re overseas - say, in a 220V country - but you’re using an amp that has a 120V power section, you’ll need a BrownBox II. Maybe you’re on tour and brought your own amp - maybe you live in a 220V country but you own an American powered amp. You can’t just plug it into the wall - you need a step down transformer to get from 220V to 120V - and then you can use the BrownBox II.
WHY NOT JUST USE A BROWNBOX?
Not all step down transformers are frequency compensating - that means that what you’re probably getting is 120V / 50Hz. That will fry an Original BrownBox - which is only meant for 120V / 60Hz - like an egg. To safely use our products with a step-down transformer, you’ll need a BrownBox II.
CAN I USE A BROWNBOX II IN NORTH AMERICA?
Absolutely. The BrownBox II accepts 50 Hz and
above, so it is safe to operate it at both 120V/50Hz and 120V/60Hz. If you’re not taking the BrownBox out
of North America, you really don’t need a BrownBox II - but YES, it will safely work.

THE BROWNBOX 200 SERIES
Input: 230VAC, 50 Hz; Standard IEC AC cable
Output: Two female IECC IEC sockets; Selectable Fine Voltage Reduction and Coarse Reduction
Power Handling: 2.5 Amps at 230VAC, 50 Hz, up to 440 Watts
All the goods as The Original BrownBox, but made for 220-240VAC/50Hz
THE DETAILS
- 220-240 Volt AC, 50 Hz, 2.5 Amp Voltage Attenuator supplies up to 440 Watts, designed for mid to larger sized amplifiers. Can also be used for parallel or dual amp rigs
- Easy to read back-lit L.C.D. display enables real-time voltage and amperage monitoring - also useful for diagnostics
- Fine-tune your voltage with both Coarse and Fine attenuation
- Proprietary transformer design wound exclusively for use with tube amplifiers, an industry first
- Equal or attenuated voltage output and a 2.5 amp fuse with in-rush current protection ensures that you will never accidentally overload your amplifier
- Powder coated EMF neutral housing and tough road rugged construction
- Silent, cool operation

THE BACKLINE 1200
Input: 120VAC, 50/60 Hz; Standard IEC AC cable
Output: Three AC Grounded Outlets; Voltage Reduction Selectable
Power Handling: 10 Amps at 120VAC, 50/60 Hz, up to 1200 Watts
RACK MOUNTABLE INPUT VOLTAGE ADJUSTMENT FOR UP TO THREE TUBE AMPLIFIERS
THE DETAILS
- 120 Volt AC, 50/60 Hz, 10 Amp Voltage Attenuator supplies up to 1200 Watts, designed for powering up to three tube amplifiers simultaneously; rack mountable
- Easy to read back-lit L.C.D. display enables real-time voltage and amperage monitoring - also useful for diagnostics
- Two attenuation modes 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 10 amp fuse with in-rush current protection ensures that you will never accidentally overload your amplifier
- Powder coated EMF neutral housing and tough road rugged construction
- Silent, cool operation

THE POWERSTATION 2400
Input: 120VAC, 50/60 Hz; Standard 15A IEC cable
Output: Three AC Grounded Outlets; Adjustable Voltage Reduction
Total Power Handling: 10 Amps at 120VAC, 50/60 Hz, up to 1200 Watts on each channel for a total of 2400 wats
RACK MOUNTABLE INPUT VOLTAGE ADJUSTMENT FOR UP TO EIGHT TUBE AMPLIFIERS
The Backline 2400 powers up to eight devices and provides two independent levels of voltage adjustment for up to four outputs per channel, allowing flexibility for players who have both vintage and modern amplifiers and whose collections require a wider range of line voltages. It can also be used to power tube outboard gear for those who are looking for an even more functional studio power solution. It is designed to work both as a stand alone device or seamlessly with amplifier-cabinet switching systems such as the Ampete Engineering switcher, elevating both your studio or your touring rig to the next level for peak performance.
THE DETAILS
- Two (2) 120 Volt AC, 50/60 Hz, 15 Amp Voltage optimizers supply up to 1200 Watts each for a total of 2400 Watts. It’s like two Backline 1200 units in one
- Two independent channels allow you to select different voltage reductions for each side, or only use one side at a time
- Easy to read back-lit L.C.D. display enables real-time voltage and amperage monitoring - also useful for diagnostics
- Two reduction modes 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 two 10 amp fuses with in-rush current protection ensures that you will never accidentally overload your amplifier
- Powder coated EMF neutral housing and tough road rugged construction
- Silent, cool operation