Description
From AmpRX:

BrownBox 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. our products can also be used with modern  solid state amp designs protecting them from potential over voltage conditions. 

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. 

BrownBox 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  custom -wound toroid  transformer, intended for use with one amplifier. check you amps input wattage  rating  prior to use. Our proprietary transformers  are custom wound exclusively for use with tube amplifier designs, but can and should be used with Solid state circuits  - 

Technical background interest
 Consider this: testing with  a non-modded vintage fender Bassman ( 5F6A) as part of our testing platform throughout the design process, one of the most important electrical design elements was measuring the variable current levels that the amp would draw at different line levels.

Testing was  performed at control levels  between 105 V.A.C. to 126 V.A.C . 

Testing indicated  current  levels of  0.7 and 1.8  amperes consecutively. 

Knowing those factors enabled us to build in exceptional electrical stability by creating a transformer with a current rating 2.5 times greater than the highest test level result of 1.8 amperes. 

BrownBox was created by a team of experienced player/ technicians with the professional player in mind. That meant first it must be intuitive and easy to use every time. Secondly, it must also have a road rugged design and be able to take abuse. Thirdly, it must be practical  and superior to any other voltage reduction option.

BrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. 

  • 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  transformer designs wound exclusively for use with tube amplifiers, an industry first!
  • Filament soft-start in full reduction mode. 
  • A powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .
  • Silent , cool operation.
  • Custom wound 5 amp proprietary  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 info plate  on the  rear of the chassis  for input watt requirements or  simply call us, we love to help.
  • 5 year parts and labor. 
  • Made in the USA.
Chicago Music Exchange

Chicago Music Exchange

Call
AmpRX
Brand New
15 Years
$349
Chicago Music Exchange
Chicago Music Exchange
773-525-7773
Chicago, IL
5:32 AM
Monday-Saturday 11 A.M. to 7 P.M. Sunday 11 A.M to 5 P.M.

Payment Terms - Orders Internet orders may be paid for using the following methods: VISA, MasterCard, American Express, Discover, and PayPal. For phone or mail orders you may pay money orders and cashier's checks by mail. Just call us at 773-525-7773 to place your order. All non-credit-card orders are subject to a 10-business-day hold. We do not accept international credit card or PayPal payments from international accounts. For international security reasons, please call the store to arrange a Bank Wire: +01-773-525-7773.

Shipping Charges - Taxes and Title Separate charges for shipping and handling will be shown on your order form. As a security precaution, initial orders and orders shipping to alternate addresses may be held for extended verification. We reserve the right to make partial shipments, which will not relieve you of your obligation to pay for the remaining deliveries. All items purchased from Chicago Music Exchange are made pursuant to a shipment contract. This means that the risk of loss and title for such items passes to you upon our delivery to the carrier. The published rates are for US domestic shipping only. Contact us directly if you wish to place an international order. For more information on our shipping policies, including rates, delivery times, and delays, please visit our website at chicagomusicexchange or call us at: 773-525-7773. If applicable, a separate charge for taxes will be shown on the invoice. We are required to collect sales tax on all orders shipped to Illinois.

3-Day / 15-day Return Policy If you are not completely satisfied with any product, return it for a full refund of the product purchase price, full credit, or exchange of your choice. We give you 3 days from the shipping date on Vintage instruments, and 15 days on New instruments. Credit card returns are issued a credit for purchase price. Refunds are made for product value only, excluding shipping and handling charges. New, Unopened items: You may return most NEW, untouched, unopened items within 15 days of delivery for a full refund. if the return is a result of our error (you received an incorrect or defective item, etc.) we'll also pay the return shipping costs. AmEx credit cards: Note that if your order was paid using an AmEx card we may pass on a 3.5% fee of the purchase price to process your refund. Vintage, Used items: We have to evaluate vintage and used guitars, amps, and other items on a case by case basis. We spend a lot of time with you and the item before your purchase to try to avoid any surprises after your purchase. AmEx credit cards: Note that if your order was paid using an AmEx card we may pass on a 3.5% fee of the purchase price to process your refund. You should expect to receive your refund within four weeks of giving your package to the return shipper, however, we strive to issue your refund sooner. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days). Send your return to: Chicago Music Exchange 3316 N Lincoln Ave Chicago, IL 60657 The following items are returnable only if defective OR unopened or unused: strings, harmonicas, microphones, cleaners, polishes, and polishing cloths. Software/soundware, cassettes, CDs, DVDs, and videos may be returned for credit only if they are in their original, sealed packaging. If defective, these items will only be exchanged for the same product. For complete details on our guarantees, shipping, and return policies, please contact our Customer Service Department at 773-525-7773; fax us at 773-525-2775; visit our website at www.chicagomusicexchange.com, or write us at Chicago Music Exchange, 3316 N. Lincoln Ave, Chicago, IL 60657.