{"product_id":"radial-j48-mono-active-direct-box","title":"Radial J48 Mono Active Direct Box","description":"\u003ch2 class=\"intro-h2\"\u003ePhantom Powered Active Direct Box\u003c\/h2\u003e\n\u003cdiv class=\"intro-p\"\u003e\n\u003cp\u003eThe J48 is a high performance active direct box for live concert touring and professional recording studio applications, with the ability to handle extreme transients without distortion while delivering the natural sound of your instrument.\u003c\/p\u003e\n\u003ch2\u003eHigher Rail Voltage, Higher Headroom\u003c\/h2\u003e\n\u003cp\u003eMost battery-powered guitars and basses will produce as much as 7 Volts when played at maximum volume, which can easily overload typical active direct boxes that are only able to handle about 3 Volts. The J48 uses a unique switching power supply that raises the internal rail voltage so it can handle up to an incredible 9 Volts, resulting in improved signal handling and greater headroom. This additional headroom significantly reduces distortion of all types, allowing the natural tone and character of the instrument to shine through.\u003c\/p\u003e\n\u003ctable class=\"table feature-product\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecifications\u003c\/th\u003e\n\u003cth\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAudio circuit type:\u003c\/td\u003e\n\u003ctd\u003eProprietary analog circuit with low-noise op-amp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency response:\u003c\/td\u003e\n\u003ctd\u003e20Hz ~ 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDynamic range:\u003c\/td\u003e\n\u003ctd\u003e109dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal harmonic distortion:\u003c\/td\u003e\n\u003ctd\u003e0.002% @ -5dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntermodulation Distortion:\u003c\/td\u003e\n\u003ctd\u003e0.003% @ -3dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase Deviation:\u003c\/td\u003e\n\u003ctd\u003e+10º at 20Hz | 0º at 1kHz | -1º at 20kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Impedance:\u003c\/td\u003e\n\u003ctd\u003e220kΩ - ¼\" input\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Impedance:\u003c\/td\u003e\n\u003ctd\u003e200Ω - XLR output\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEquivalent Input Noise:\u003c\/td\u003e\n\u003ctd\u003e-103dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise Floor:\u003c\/td\u003e\n\u003ctd\u003e-99dB below 0dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Input:\u003c\/td\u003e\n\u003ctd\u003e+10dBu\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"heading\"\u003e\n\u003ctd colspan=\"2\"\u003eFeatures\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\"\u003eInput pad, Mono Sum, 180° polarity reverse, Ground lift, HPF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Connectors:\u003c\/td\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Connectors:\u003c\/td\u003e\n\u003ctd\u003eBalanced XLR, 1\/4\" Thru\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr class=\"heading\"\u003e\n\u003ctd colspan=\"3\"\u003eGeneral\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction:\u003c\/td\u003e\n\u003ctd\u003e14 gauge steel chassis and outer shell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSize (L x W x D):\u003c\/td\u003e\n\u003ctd\u003e3.3\" x 5.0\" x 2\" (84 x 127 x 48mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight:\u003c\/td\u003e\n\u003ctd\u003e1.55 lb (720 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower:\u003c\/td\u003e\n\u003ctd\u003e48V phantom - proprietary digital switching\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConditions:\u003c\/td\u003e\n\u003ctd\u003eFor use in dry locations only between 5°C and 40°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty:\u003c\/td\u003e\n\u003ctd colspan=\"2\"\u003e\u003ca href=\"https:\/\/www.radialeng.com\/product\/j48\/legal.php#Warranty\"\u003eRadial 3-year, transferable\u003c\/a\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.radialeng.com\/wp-content\/uploads\/2026\/03\/J48-Manual-WEB-02-26.pdf\" target=\"_blank\" title=\"Radial J48 User Guide\" rel=\"noopener\"\u003eUser Guide\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Radial","offers":[{"title":"Default Title","offer_id":47953706189018,"sku":"R800 3001","price":259.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0014\/9585\/9277\/files\/j48-product_34_right.jpg?v=1780598245","url":"https:\/\/www.rocketmusicshop.com\/products\/radial-j48-mono-active-direct-box","provider":"RocketMusic","version":"1.0","type":"link"}