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Description
brown box pedal AmpRx BrownBox Tube Amp Input Voltage AttenuatorThe AmpRx BrownBox is a tool that every tube amp owner should look into! The BrownBox is an impressive gadget that has certainly been a long time coming to the amp loving community. It was created to provide a safe range of voltage reduction levels for vintage tube amplifier designs. The same, era correct voltage levels that the amps were designed around. The dynamics of a vintage amp supplied with the proper line voltage are optimized and will sound
The AmpRx BrownBox is a tool that every tube amp owner should look into!The BrownBox is an impressive gadget that has certainly been a long time coming to the amp loving community. It was created to provide a safe range of voltage reduction levels for vintage tube amplifier designs. The same, era-correct voltage levels that the amps were designed around.
The dynamics of a vintage amp supplied with the proper line voltage are optimized and will sound and respond as originally intended, revealing the circuits true harmonic content. This is the starting point, the basis of the signal chain, and where serious musicians begin creating a signature tone.
Most vintage tube amps respond more harmonically and touch sensitive with optimized voltage . Placing these circuits back into balance reveals the authentic tone fundamental of the amp, tone that can truly blossom.
For the Tube Tone Purist, no pedal or attenuator can come close to replicating the heavenly response of dry, purely saturated tubes. Pedals and attenuators have their place, keeping in mind that they color your tone, not create it.
Everyone can enjoy multi-dimensional, pure tube tone, if they just know where to start.
Brown Box is not a variac. Unlike a variac, Brownbox cannot accidentally harm or destroy your amplifier. The maximum input voltage available using BrownBox is your regional line wall voltage, in bypass mode. All other selections are reduction levels that you determine sound best for your amp.
BrownBox employs a proprietary, American made, 5 amp transformer, intended for use with one amplifier. Our proprietary transformer was custom wound exclusively for use with tube amplifiers - no off the shelf transformers or test-bench variac's here!
Why Voltage Optimization?
Voltage Optimization provides numerous benefits:
Earlier tube saturation equals earlier break-up at lower usable volume levels .
A smoother tonal shift toward even order harmonics, revealing the amplifier's designed tone fundamental , the basis of your signal chain and the starting point in building a consistent signature tone.
Lower internal voltages = lower dissipation = longer component life.
BrownBox Key Features
- Easy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.
- Tough road rugged construction.
- Proprietary design exclusively for use with tube amplifiers.
- Filament soft-start in full reduction mode.
- A powder coated EMF neutral housing.
- Fully integrated in-rush current and transient protection, as well as over-load protection .
- Silent operation.
- Custom wound 5 amp proprietary transformer.will supply 540 watts max@ 120 Vac.
- LIFETIME WARRANTY.
- Made in the USA.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Product Reviews
★★★★★ 5
Great Dump Tray
Color: Coffee Brown, Size: Rectangle
I’m very happy with this product! It was easy to assemble and looks great. The size is perfect for unloading my pockets each day. It looks very nice and functions perfectly. Thoroughly impressed!
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Reviewed in the United States on January 4, 2026
★★★★★ 4
4 stars
Color: Brown, Size: Rectangle
I like the tray a lot. Quality is very good. Color (Brown) is attractive. Size is perfect for my nightstand. It holds phone, remote, eyeglasses, & phone. I threaded my phone charging cord through a corner of the tray. But it slides too easily off of the nightstand. I'm going to try to find something to stop it from sliding that will stick to the underside of the tray without harming the wood surface on my cherry nightstand.
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Reviewed in the United States on April 13, 2025
★★★★★ 5
faux leather container for men
Color: Blue, Size: Square
It's a very well made container happy with purchase
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Reviewed in the United States on February 28, 2026
★★★★★ 5
Better than other flimsy trays
Color: Black, Size: Rectangle, Color: Black, Size: Rectangle
I got this to replace another flimsy valet tray I got as a gift. This one is way more sturdier, looks nicer, bigger, and has a nice feel.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Looks great, doesn't hold much so measure carefully
Color: Gray, Size: Rectangle
I got this organizer for my husband to keep his stuff by the door. While it's a little smaller than I'd hoped, it looks great in the entryway. It's super easy to snap together, but feels like the material could be damaged easily if you're not careful. He is able to store his keys, wallet, and sunglasses in it, and throws hit hat on top. Overall we are really happy with it.
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Reviewed in the United States on January 31, 2026