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collapse expand iconDescription

Easy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.
Amprx Power Solutions BrownBox Brown
Amprx Power Solutions BrownBox Brown
Amprx Power Solutions BrownBox Brown

collapse expand iconFeatures

  • Tough road rugged construction
  • Filament soft-start in full reduction mode
  • A powder coated EMF
  • Silent, cool operation
  • Custom wound 5 transformer that will supply 540 watts max@ 120 Vac. 
  • Designed for Mid to larger sized Amps, Fender Bassman, Marshall 50s/100S etc. or for Parallel or DUAL amp rigs. Be sure to check the manufactures rear of the chassis for input watt requirements or simply call us, we love to help
  • 5 year parts and labor
  • Establishes the basis for your signal chain and the starting point in building a consistent signature tone. Earlier power tube saturation equals earlier break-up at more usable volume levels . 
  • A smoother tonal shift even order harmonics, revealing the amplifier's true designed tone fundamental. 
  • Lower internal voltages = lower dissipation = longer component life.

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collapse expand iconReviews

5

5 Reviews

100%

of respondents would recommend this to a friend

Filters
Best Uses
  1. High-End Equipment3
  2. Having Around The House1
  3. Travel1
  4. Dialing in your tone you're seeking.1
  5. Vintage amps1
Describe Yourself
  1. Quality Oriented4
  2. Budget Shopper1
Primary use
  1. Personal5
Pros
  1. Reliable5
  2. Good Value4
  3. Good Power Output2
  4. Fast Charge1
  5. Adds a new dimension to the sound and feel.1

Reviewed by 5 customers

  • Must Have For Tube Amp

    5

    Verified BuyerVerified Buyer

    submitted9 months ago

    byDavid

    fromPittsburgh Pennsylvania

    Submitted as part of a sweepstakes

    Great gear

  • I like the feel of the notes with the Brown Box

    5

    submitteda year ago

    byJeff

    fromMadison, Tennessee

    I purchased one for my '68 Princeton reverb. love the feel of turning down the power. Liked it so much I added a second unit for my Vox AC15c1 Both respond well to all power level settings. However, each amp has a difference sweet setting. Max gets a bit dirty (wink)

  • Cheap insurance

    5

    Verified BuyerVerified Buyer

    submitteda year ago

    byCurt

    from97423

    Submitted as part of a sweepstakes

    Runs my amps easier

  • Best addition to my rig in years

    5

    submitted3 years ago

    byJohn

    fromNashville, TN

    After a few blown fuses in my Bogner Shiva amp head I checked the outlet voltage and was running at 127V! Turns out the outlet voltage in the Nashville area regularly hovers around 127V which is WAY TOO MUCH for an amp that is designed for 117V and internally steps up power 3x to 351v (most tube amplifiers do this to some extent). After introducing the BrownBox my amps immediately performed better, and I had piece of mind that I'm not hurting my amp. Secondary benefit being extending tube life, this box will easily pay for itself at some point down the road. My problem was solved, but it gets better. This device allows you to safely lower to voltage below what an amp needs....creating a certain sound that a certain guitar legend very much favored out of his 100W Marshall amps (need I say...the BROWN SOUND?!?) Obviously experiment at your own risk, but lowering my amp down to about 110-112V I've now achieved a tone that I've been trying to nail for decades - that I had NO IDEA was a result of voltage. THAT was a happy accident...buy this because your nice amps deserve it, and then enjoy phenomenal vintage tones with ease. On that the only thing I'm disappointed in is that I didn't know about this box. I'm a gear nut, and like to think I'm pretty informed about what's out there. I'm honestly surprised these things aren't sold out everywhere. The quality of the box is top notch, and the amount of people I hear moaning about tube life, inconsistent tone from night to night/club to club that DO NOT have this box...is bananas to me. Anyway point is I found this by accident scrolling a buddy's facebook page...but people NEED TO KNOW DOC! So maybe GC needs to push this a bit more instead of Furman rack units IMO...most guys don't have a rack, but EVERYONE w/ a tube amp could use this box.

  • Solid and heavy, works great

    5

    submitted3 years ago

    byScott

    fromBoston

    Use it with a variety of vintage amps to get them running at the voltage they were designed for. Higher voltage does not equal better amp tone and also can ruin both tubes and transformers.

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collapse expand iconQ&A

Have a question about this product? Our expert Gear Advisers have the answers.

  • submitted3 years ago

    asked byrocknrollflat5

    fromMagdalena New Mexico 🇺🇸

    will this be compatible and on Fuchs mantis jr 20 watt tube combo amp.

    will this be compatible and on Fuchs mantis jr 20 watt tube combo amp.

    Open Reply - Ronald
    Thank you for reaching out to us. Unfortunately we need some more info before we can give you a for sure answer. Please give us a call at 866-498-7882 and we can get you squared away.