Will post actual pics later tonight
Comes with original Box Absolutely mint and serviced by AmpRX

Read about it here:
https://www.sweetwater.com/store/detail/BrownBox--amprx-brownbox-tube-amplifier-input-voltage-attenuator


IF YOU ASK ME IF IT'S STILL AVAILABLE, YOU WILL RECEIVE NO RESPONSE, SIMPLY BECAUSE OF YOUR LACK OF EFFORT :-)
NO SHIPPING/PICKUP ONLY/CASH OR EMT ONLY/YES IT'S AVAILABLE, I AM LOCATED IN OAKVILLE RIGHT ACROSS FROM SHERIDAN COLLEGE

Keywords : Mesa, Boogie, ENGL, Driftwood, Fryette, Marshall, Splawn, Mezzabarba, Friedman, Bogner, Wizard, Peavey, EVH, 5150, Framus, Randall, Krank, Fortin, Omega
Fender , Marshall , squier , stratocaster , les paul , sg , telecaster, r9 , r8 , r7 , r0 custom shop PRS , Friedman , Suhr , Gibson , Epiphone , Jackson , MESA , Orange , Celestion , Taylor , Martin , EVH , Guitar , amp

https://www.sweetwater.com/store/detail/BrownBox--amprx-brownbox-tube-amplifier-input-voltage-attenuator




Optimal Voltage for Superior Tube-amp Tone
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Whether you're a professional recording engineer or a consummate tone purist, if you want to get the best possible sound from your tube amp, then you need an AmpRX BrownBox voltage attenuator. All tube amps (especially vintage tube amps) are designed to run at an optimal voltage, and standard 120V/AC wall voltage is typically too high for vintage tube amps, as well as some modern designs. With its proprietary 5-amp transformer and flexible attenuation options, the AmpRX BrownBox lets you bring that voltage down to an optimal level, resulting in significantly improved amp performance.

Safe, effective, and easy to use
Another benefit of running your amp at optimal voltage is that your tubes will usually last much longer — something many of us here at Sweetwater who've paid a pretty penny for new-old-stock tubes can appreciate. The BrownBox is far safer and more effective than any standard variac because it limits the input voltage and attenuates the output voltage. Figuring out your amp's optimal voltage is as easy as Googling the specs, and the BrownBox's onboard output voltmeter lets you see exactly what you're pulling. The BrownBox's four voltage-reduction modes let you get as close to optimal as possible, and there's a bypass setting so you can A/B the results.


AmpRX BrownBox Features:
The perfect way to optimize the input voltage for your full-sized tube amp
Dramatically improves your amp's performance by providing optimized voltage
Optimal input voltage also extends the life of your high-performance power tubes
LCD voltmeter makes it easy to dial in the optimal setting for your amp
Selectable input voltage setting ensures safe and accurate operation
5-amp, 120/122/124/126VAC input settings accommodate most wall voltages
Equal or attenuated output ensures that you can't accidentally overload your amp
Choose from 4 attenuation modes (3%, 4%, 6%, and 10%) to fine-tune your voltage
Bypass mode lets you easily A/B the results of your optimized amp voltage
Braced metal chassis and protective bar withstand the most brutal touring conditions
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Tech Specs
Type: Voltage Attenuator
Power Handling: Up to 540W @ 120V AC (5 amp)
Inputs: Line voltage
Outputs: 2 x AC grounded outlets, 110V - 126V AC; up to 10% reduction
Power Source: Standard IEC AC Cable
Height: 4.87"
Width: 4.5"
Depth: 7.5"
Manufacturer Part Number: BB-0000-A
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Reviews
4.9
65 Reviews


5 Stars
88%

4 Stars
11%

3 Stars
0%

2 Stars
2%

1 Stars
0%
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Customer Photos & Videos


Rated 5/5
Get genuine feel and tone of your amp
First of all this is extremely well-made it's built like a tank. Most importantly though, you are allowed to warm up the filaments of your tubes and the internal parts of the amplifier at lower voltage and lower amps which really does provide longevity for the parts. If you have vintage amplifiers that run at lower VAC and require lower amps it's the perfect tool for that. Additionally, you can use it with... read more
by Sweetwater Customer on June 29, 2021
Rated 5/5
Believe the hype, it's worth every cent!!
All the previous reviews are spot on except it really does not automatically regulate your voltage, if your supply line is moving around, you still need to change it but it does allow to manually lower the voltage in steps down to as much as 10% or bypass so you'll be able to A/B pretty easily. As I said you'll still need to monitor the voltage periodically because of your supply is anything like mine then it... read more
by Coolbreeze from Dallas on August 23, 2020
Music background: Blues based music of all genres
Rated 5/5
From 125 at wall adjusted to 115. ‘57 Deluxe. Old and new amps benefit. Apparently (?) re-bias tubes after adjusting voltage. Maintain the voltage used to rebias.
Went from 125 to 115 and makes a NOTICEABLY positive difference. Very Worth it. Clarifies and resolves fully the (quiets) the soundstage.

Fender reissue '57 Deluxe. Old and new amps benefit. Apparently (?) re-bias tubes after adjusting voltage. Maintain... read more
by Sweetwater Customer on May 9, 2025
Rated 5/5
The BrownBox is Awesome
I doubt that anyone could have talked me into one of these. I received it as a gift, and what a gift!
It's as if Fender Tweed amps came alive again.
Each of my tweed amps (varying models and wattages) had it's own "sweet spot" when selecting and... read more
by Don Parker from Atlanta area on October 7, 2024
Music background: Former professional musician. Playing over 52 years.
Rated 5/5
V Time!
Simply put 121 to 123V's coming in and never the same each day! Wondered why my Mesa Boogie never sound the same from day to day! Yes this will smooth out that "harshness and now each day is a Great Boogie Day!
by Majorthom from R&R Hall of Fame, OH on April 29, 2024
Music background: Rockin since the mid 60's
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Type Voltage Attenuator Voltage Attenuator Voltage Attenuator Reactive Active Attenuator Reactive Load, Attenuator
Power Handling Up to 540W @ 120V AC (5 amp) 1200W @ 120V AC (10 amps) Up to 480W/4A 200W RMS 100W
Inputs Line voltage Multiple Primary Voltages; 120V, 122V, 124V, 126V Standard IEC AC Cable, 120V/50-60Hz 1 x 1/4" (Amp in), 2 x 1/4" (Line in A, Line in B) 1 x 1/4" (8 ohm, 100W input),
Outputs 2 x AC grounded outlets, 110V - 126V AC; up to 10% reduction 3 x AC grounded outlets, Reduction Select 3%, 4%, 6%, 10% NEMA 5-15-P Female 2 x 1/4" (Cab out A, Cab out B), 2 x XLR (Line out A, Line out B) 1 x 1/4" (min 4 ohm output), 2 x XLR (L, R Line out)
Power Source Standard IEC AC Cable Standard IEC AC connector Standard IEC AC Cable Standard IEC Power Cable -
Height 4.87" - 4.12" - 3.89"
Width 4.5" - 4" - 7.87"
Depth 7.5" - 5.75" - 7.95"
See also: Attenuators, AmpRX, AmpRX Amp Attenuators
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