AmpRx
B-Stock BlackOutBox: Limited Edition Halloween BrownBox
B-Stock BlackOutBox: Limited Edition Halloween BrownBox
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A note about B-Stocks: One might call it “scratch-n-dent”, another might call it “relic'ed” (if that’s you, we won’t even charge you extra!). In any case, these units are perfectly functioning on the inside, but have minor imperfections on the outside. Some examples include small paint chips and color inconsistencies.
Tame the power, unleash the tone—no tricks, just treats!
Beware the Voltage Vampires! 🧛♂️ This Halloween, don’t let your amplifier fall victim to the horrors of high voltage. The BrownBox will tame wild power surges that haunt your gear, and restoring the spooktacular tone you crave. Whether your amp needs 116V or 110V, the BrownBox ensures it gets just the right amount of juice—no tricks, just tonal treats! 🎃
When today’s power sources send out dangerous levels from 120V to 129V, it’s enough to make your amp scream! With the BrownBox’s adjustable voltage reduction feature, you can banish those voltage demons and resurrect your amp’s true sound. Discover spine-chillingly precise performance as the BrownBox revives both modern and vintage gear, delivering the optimal voltage every time.
THE SPOOKY DETAILS
- ⚡ Voltage Slayer: Handles up to 540 Watts / 5 Amperes and is perfect for amplifiers ranging from small to large monsters like the Fender Deluxe, Vox AC30, or Marshall 50W.
- 🧙♂️ Magic LCD: A back-lit display shows you real-time voltage and amperage, allowing you to monitor your amp and avoid any shocking surprises.
- 🕸️ Dual Adjustment Modes: Two modes to help fine-tune voltage, giving you control over every eerie sound.
- 🦇 Foolproof Protection: With in-rush current protection and a 5-amp fuse, the BrownBox protects your amp from overload so the ghouls of over-voltage can never strike.
- 🛡️ Tough as a Tombstone: Rugged, EMF-neutral housing ensures silent, cool operation—even in the scariest of conditions.
Keep your tone hauntingly perfect and protect your amp from voltage terrors. This Halloween, let the BrownBox be your amp's guardian against the ghosts of unstable power!
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Learn How to Use the BrownBox
Let customers speak for us
from 68 reviewsI’m very happy with my purchase of the Brownie. It’s more compact than the regular Brown Box and more suited to the types of amps I gig daily

If you play vintage tube amps from the 50s or 60s you need one of these. You'll be able to tell instantly that you needed it all along...

Shipping was fast, and I got my second "Brownie" in, it looks and operates just like the non B stock Brownie, and at a discount price!

Received my AmpRx mugs patches and swag. Y'all are life savers. Just rack3d my new Power Station 1200...an absolute amp saver. My tracks have never sounded better. Keep up the great work!!! - Coop

The Brownbox is an essential piece of gear. All of my new and vintage amps sound better with the brown box. My house has 123-125volts, everything sounds a little hard at that voltage. Reduced voltage makes my black face amps creamier and my tweet amps sweeter.

I love this with shirt. Purchased it with an extra patch.

Thanks for processing the order quickly and the fast shipping!

Yep. Does what y’all say it does. Got an old Deluxe (as most do, I suppose), that sounds better than it ever has. Hell, I’m even using it with old tube mics, pre’s & compressors. ALL sound … well … better - thanks!

This is a tour grade, durable little box! Easy to dial in, and a good safety measure for spikes in power etc. I also like that you can feel a differences. For my '65 Bandmaster head, I find that the BrownBox smooths out the high end and gives the response a fuller, rounded out feel by lowering the voltage to 117v. Thank you AmpRx!

This thing is awesome, it does what the Brownbox does and more! You can dial down the voltage OR dial it up if need… the world is better because of this little dude… it fits in the back of my amp, it loves me, it helps me not blow sh*t up, if only it could make me a sandwich….. hmmm…… 😎

If you want your amp to be consistent between home, rehearsal, stage, and studio, just buy one. Carry it with you and use it everywhere. It's killer. Then buy at least one spare just in case.

Love this thing. My amp sounds better and the customer service and ease of use is incredible.
