{"title":"AmpRX","description":"","products":[{"product_id":"amprx-brown-box-tube-amplifier-input-voltage-attenuator-1041805","title":"AmpRX Brown Box Tube Amplifier Input Voltage Attenuator","description":"\u003ci\u003eFrom AmpRX:\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eThe 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.  \u003cbr\u003e\u003cbr\u003eMost 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. \u003cbr\u003e\u003cbr\u003eFor 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.\u003cbr\u003e\u003cbr\u003eEveryone can enjoy multi-dimensional, pure tube tone, if they just know where to start. \u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eBrownBox  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  - \u003cbr\u003e\u003cbr\u003eTechnical background interest\u003cbr\u003e 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.\u003cbr\u003e\u003cbr\u003eTesting was  performed at control levels  between 105 V.A.C. to 126 V.A.C . \u003cbr\u003e\u003cbr\u003eTesting indicated  current  levels of  0.7 and 1.8  amperes consecutively. \u003cbr\u003e\u003cbr\u003eKnowing 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. \u003cbr\u003e\u003cbr\u003eBrownBox 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.\u003cbr\u003e\u003cbr\u003eBrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. \u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eEasy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.\u003c\/li\u003e\n\u003cli\u003eTough road rugged construction.\u003c\/li\u003e\n\u003cli\u003eProprietary  transformer designs wound exclusively for use with tube amplifiers, an industry first!\u003c\/li\u003e\n\u003cli\u003eFilament soft-start in full reduction mode. \u003c\/li\u003e\n\u003cli\u003eA powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .\u003c\/li\u003e\n\u003cli\u003eSilent , cool operation.\u003c\/li\u003e\n\u003cli\u003eCustom 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.\u003c\/li\u003e\n\u003cli\u003e5 year parts and labor. \u003c\/li\u003e\n\u003cli\u003eMade in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":34497049526407,"sku":"BROWNBOX","price":399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brown-box-tube-amplifier-input-voltage-attenuator-brownbox-30222637891719.jpg?v=1675271635"},{"product_id":"amprx-brownbox-ii-tube-amplifier-input-voltage-attenuator-1286960","title":"AmpRX BrownBox II Tube Amplifier Input Voltage Attenuator","description":"The BrownBox is a voltage optimizer that was designed to offer a safe range of voltage reduction levels made specifically for the same, era-correct voltages that vintage tube amps were designed around. It lowers the line voltage from your wall to what the designers intended. The change in sound goes from slight to significant, depending on what you are using. An important side effect of the lower or browned out voltage is longer life for tubes, caps and all internal components. The BrownBox cleverly meters the line voltage from the wall, and then can be selectively lowered to the desired amount. ","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":39488397181063,"sku":"BROWNBOXII","price":399.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brownbox-ii-tube-amplifier-input-voltage-attenuator-brownboxii-30222208827527.jpg?v=1675264798"},{"product_id":"amprx-brown-box-tube-amplifier-input-voltage-attenuator-1444831","title":"AmpRX Brown Box Tube Amplifier Input Voltage Attenuator","description":"\u003cb\u003eCondition:\u003c\/b\u003e Item is subject to minor cosmetic imperfections. Packaging may be in poor shape. The item displayed in the images may not be the actual item you receive.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eThe 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.  \u003cbr\u003e\u003cbr\u003eMost 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. \u003cbr\u003e\u003cbr\u003eFor 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.\u003cbr\u003e\u003cbr\u003eEveryone can enjoy multi-dimensional, pure tube tone, if they just know where to start. \u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eBrownBox  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  - \u003cbr\u003e\u003cbr\u003eTechnical background interest\u003cbr\u003e 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.\u003cbr\u003e\u003cbr\u003eTesting was  performed at control levels  between 105 V.A.C. to 126 V.A.C . \u003cbr\u003e\u003cbr\u003eTesting indicated  current  levels of  0.7 and 1.8  amperes consecutively. \u003cbr\u003e\u003cbr\u003eKnowing 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. \u003cbr\u003e\u003cbr\u003eBrownBox 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.\u003cbr\u003e\u003cbr\u003eBrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. \u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eEasy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.\u003c\/li\u003e\n\u003cli\u003eTough road rugged construction.\u003c\/li\u003e\n\u003cli\u003eProprietary  transformer designs wound exclusively for use with tube amplifiers, an industry first!\u003c\/li\u003e\n\u003cli\u003eFilament soft-start in full reduction mode. \u003c\/li\u003e\n\u003cli\u003eA powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .\u003c\/li\u003e\n\u003cli\u003eSilent , cool operation.\u003c\/li\u003e\n\u003cli\u003eCustom 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.\u003c\/li\u003e\n\u003cli\u003e5 year parts and labor. \u003c\/li\u003e\n\u003cli\u003eMade in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":39823812952199,"sku":"BROWNBOX-FBAU","price":359.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brown-box-tube-amplifier-input-voltage-attenuator-brownbox-fbau-29088536723591.jpg?v=1647033634"},{"product_id":"amprx-brown-box-tube-amplifier-input-voltage-attenuator-1467958","title":"AmpRX Brown Box Tube Amplifier Input Voltage Attenuator","description":"\u003cb\u003e\u003ci\u003ePlease Note:\u003c\/i\u003e\u003c\/b\u003e Damaged packaging and minor blemishes on the item.\u003cbr\u003e\u003ci\u003eFrom AmpRX:\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eThe 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.  \u003cbr\u003e\u003cbr\u003eMost 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. \u003cbr\u003e\u003cbr\u003eFor 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.\u003cbr\u003e\u003cbr\u003eEveryone can enjoy multi-dimensional, pure tube tone, if they just know where to start. \u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eBrownBox  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  - \u003cbr\u003e\u003cbr\u003eTechnical background interest\u003cbr\u003e 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.\u003cbr\u003e\u003cbr\u003eTesting was  performed at control levels  between 105 V.A.C. to 126 V.A.C . \u003cbr\u003e\u003cbr\u003eTesting indicated  current  levels of  0.7 and 1.8  amperes consecutively. \u003cbr\u003e\u003cbr\u003eKnowing 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. \u003cbr\u003e\u003cbr\u003eBrownBox 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.\u003cbr\u003e\u003cbr\u003eBrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. \u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eEasy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.\u003c\/li\u003e\n\u003cli\u003eTough road rugged construction.\u003c\/li\u003e\n\u003cli\u003eProprietary  transformer designs wound exclusively for use with tube amplifiers, an industry first!\u003c\/li\u003e\n\u003cli\u003eFilament soft-start in full reduction mode. \u003c\/li\u003e\n\u003cli\u003eA powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .\u003c\/li\u003e\n\u003cli\u003eSilent , cool operation.\u003c\/li\u003e\n\u003cli\u003eCustom 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.\u003c\/li\u003e\n\u003cli\u003e5 year parts and labor. \u003c\/li\u003e\n\u003cli\u003eMade in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":39857118609543,"sku":"BROWNBOX-u1","price":330.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brown-box-tube-amplifier-input-voltage-attenuator-brownbox-u1-29165406453895.jpg?v=1649713289"},{"product_id":"amprx-brown-box-tube-amplifier-input-voltage-attenuator-1539870","title":"AmpRX Brown Box Tube Amplifier Input Voltage Attenuator","description":"\u003cb\u003e\u003ci\u003ePlease Note:\u003c\/i\u003e\u003c\/b\u003e Minor cosmetic blemishes and signs of use to unit and packaging.\u003cbr\u003e\u003ci\u003eFrom AmpRX:\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eThe 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.  \u003cbr\u003e\u003cbr\u003eMost 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. \u003cbr\u003e\u003cbr\u003eFor 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.\u003cbr\u003e\u003cbr\u003eEveryone can enjoy multi-dimensional, pure tube tone, if they just know where to start. \u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eBrownBox  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  - \u003cbr\u003e\u003cbr\u003eTechnical background interest\u003cbr\u003e 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.\u003cbr\u003e\u003cbr\u003eTesting was  performed at control levels  between 105 V.A.C. to 126 V.A.C . \u003cbr\u003e\u003cbr\u003eTesting indicated  current  levels of  0.7 and 1.8  amperes consecutively. \u003cbr\u003e\u003cbr\u003eKnowing 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. \u003cbr\u003e\u003cbr\u003eBrownBox 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.\u003cbr\u003e\u003cbr\u003eBrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. \u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eEasy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.\u003c\/li\u003e\n\u003cli\u003eTough road rugged construction.\u003c\/li\u003e\n\u003cli\u003eProprietary  transformer designs wound exclusively for use with tube amplifiers, an industry first!\u003c\/li\u003e\n\u003cli\u003eFilament soft-start in full reduction mode. \u003c\/li\u003e\n\u003cli\u003eA powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .\u003c\/li\u003e\n\u003cli\u003eSilent , cool operation.\u003c\/li\u003e\n\u003cli\u003eCustom 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.\u003c\/li\u003e\n\u003cli\u003e5 year parts and labor. \u003c\/li\u003e\n\u003cli\u003eMade in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":39942969229447,"sku":"BROWNBOX-u2","price":335.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brown-box-tube-amplifier-input-voltage-attenuator-brownbox-u2-29370149699719.jpg?v=1657306933"},{"product_id":"amprx-brown-box-tube-amplifier-input-voltage-attenuator-1639116","title":"AmpRX Brown Box Tube Amplifier Input Voltage Attenuator","description":"\u003cb\u003e\u003ci\u003ePlease Note:\u003c\/i\u003e\u003c\/b\u003e Minor cosmetic blemishes.\u003cbr\u003e\u003ci\u003eFrom AmpRX:\u003c\/i\u003e\u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eThe 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.  \u003cbr\u003e\u003cbr\u003eMost 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. \u003cbr\u003e\u003cbr\u003eFor 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.\u003cbr\u003e\u003cbr\u003eEveryone can enjoy multi-dimensional, pure tube tone, if they just know where to start. \u003cbr\u003e\u003cbr\u003eBrownBox 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. \u003cbr\u003e\u003cbr\u003eBrownBox  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  - \u003cbr\u003e\u003cbr\u003eTechnical background interest\u003cbr\u003e 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.\u003cbr\u003e\u003cbr\u003eTesting was  performed at control levels  between 105 V.A.C. to 126 V.A.C . \u003cbr\u003e\u003cbr\u003eTesting indicated  current  levels of  0.7 and 1.8  amperes consecutively. \u003cbr\u003e\u003cbr\u003eKnowing 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. \u003cbr\u003e\u003cbr\u003eBrownBox 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.\u003cbr\u003e\u003cbr\u003eBrownBox  is completely proprietary in design and function and comes with a lifetime warranty with normal use. \u003cbr\u003e\u003cbr\u003e\u003cul\u003e\n\u003cli\u003eEasy to read, back-lit L.C.D. display enabling real-time voltage and amperage monitoring, also useful for diagnostics.\u003c\/li\u003e\n\u003cli\u003eTough road rugged construction.\u003c\/li\u003e\n\u003cli\u003eProprietary  transformer designs wound exclusively for use with tube amplifiers, an industry first!\u003c\/li\u003e\n\u003cli\u003eFilament soft-start in full reduction mode. \u003c\/li\u003e\n\u003cli\u003eA powder coated EMF  neutral housing.  In-rush current protection, fused over-load protection .\u003c\/li\u003e\n\u003cli\u003eSilent , cool operation.\u003c\/li\u003e\n\u003cli\u003eCustom 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.\u003c\/li\u003e\n\u003cli\u003e5 year parts and labor. \u003c\/li\u003e\n\u003cli\u003eMade in the USA.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"AmpRX","offers":[{"title":"Default Title","offer_id":40286346936455,"sku":"BROWNBOX-u3","price":340.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0343\/4368\/2183\/products\/amprx-amps-attenuators-amprx-brown-box-tube-amplifier-input-voltage-attenuator-brownbox-u3-29986894086279.jpg?v=1668443713"},{"product_id":"amprx-brown-box-ii-tube-amplifier-input-voltage-attenuator-1861623","title":"AmpRX Brown Box II Tube Amplifier Input Voltage Attenuator","description":"\u003cp\u003eThe BrownBox is a voltage optimizer that was designed to offer a safe range of voltage reduction levels made specifically for the same, era-correct voltages that vintage tube amps were designed around. 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