AmpRX Brown Box Tube Amplifier Input Voltage Attenuator

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AmpRX Brown Box Tube Amplifier Input Voltage Attenuator

Brand New
  • $349.00

Description & Specs

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.

You read that right! Any orders over $30 ship for free!*

The CME Difference:  CME's mission is to make sure your shipment will arrive quickly, carefully, and correctly. We realize that the online ordering of guitars and instruments, in general, can be a nerve-racking experience. We are here to put your mind at ease and make your transaction smooth and enjoyable! As musicians ourselves, we want to make sure everything gets to you the way it should, every time.

Most orders ship the same or next day:  
We greatly appreciate your patience, and are working hard to fulfill all requests as quickly as possible, while practicing recommended safety guidelines.

Our Bottom line: We care! This is something we take very seriously, because it's what you deserve. Our shipping, sales, and customer service teams are always striving to create the best experience for you. If you have any questions, comments, or concerns, we want to know.

Please don't hesitate to reach out to support@chicagomusicexchange.com, or call us directly at 773-525-7773.

*Special exceptions do apply.

The CME Showroom is Open!

Our maximum capacity is 50 people. Per Illinois mandate, we require a mask be worn for entry, and during the length of your visit. Please observe social distancing guidelines while in the store. Thank you for your cooperation.



STORE HOURS (CST)

12PM-6PM Tues-Sat

CLOSED Sun-Mon


Scheduling an appointment is preferred, but we are taking walk-ins. For more details, give us a call at (773) 525-7773


Before & After Hours: Try us!
If we are not available, our commitment is to get back to you no later than the next day.


US & International: +1 (773) 525-7773


Fax: 773-525-2775



LOCATION 

3316 N Lincoln Avenue Chicago, IL 60657


We're right off the CTA Brown Line 'Paulina' Stop Just North of Belmont and just West of Ashland.

We’re all musicians here at Chicago Music Exchange and we want you to love the gear you get from us. We understand that sometimes you get a piece of gear that doesn’t work out for you. That’s why we offer an easy return policy to take the stress out of purchasing from us.

If you decide you'd like to return an item, please contact your Sales Rep, fill out the Return Request form below, or give us a call.

If you placed your order on Amazon or eBay, we advise issuing the return request from your account on the platform of purchase - our Customer Service team will process a refund upon receipt of the item(s).

Most new items may be returned within 30 days of delivery and most vintage & used items may be returned within 3 days of delivery for a full refund, exchange, or store credit. Please pack the product safely for the journey back to us. If the product was shipped for free, the charge will be deducted from refund, unless the reason for the return is outside normal circumstances.

Please contact us as soon as possible if your order was received incorrectly, damaged, or defective. Most times we will give you an RA number (Return Authorization). Why is that number important? This will allow us to speed up the process of the return.

We reserve the right to charge a restocking fee based on the return condition. Some items we just can’t take back for returns, due to a one time function like strings or drums heads and other times it’s not sanitary to do so with microphones or harmonicas. If you aren’t sure if what you bought falls into a category like this, call us (773) 525-7773!

We strive to get your return processed quickly. Most of the time we have it done within two business days. Funds going back to credit cards usually takes two to four business days. CME strives to make sure all customers are happy with their experience. It is our priority to provide great service along with great gear. We always want to be helpful, and open to your feedback. Please let us know your thoughts! If you have any questions, we’re here for you!

Feel free to email us at customerservice@chicagomusicexchange.com or give us a call at (773) 525-7773.