{"product_id":"radial-engineering-j48-stereo-2-channel-active-direct-box-with-48v-phantom-power","title":"Radial Engineering J48 Stereo 2 Channel Active Direct Box with 48V Phantom Power","description":"\u003cp\u003eThe Radial J48 Stereo is a professional two-channel active direct box designed for demanding stage and studio applications. Built around a proprietary low-noise analog circuit, the J48 Stereo delivers exceptional signal handling, low distortion, wide frequency response, and high headroom while maintaining clear stereo separation between its left and right channels.\u003c\/p\u003e\n\u003cdiv class=\"iframe-container\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/U8zUrouUx-Y\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003cp\u003eA unique switching power supply raises the internal rail voltage to provide up to 9 Volts of signal handling, making the J48 Stereo particularly well suited to high-output keyboards, battery-powered instruments, and other sources that can overload conventional active direct boxes.\u003cimg src=\"https:\/\/www.radialeng.com\/wp-content\/uploads\/2018\/04\/MG_7708.jpg\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp\u003eThe J48 Stereo can function as two independent direct boxes, Its rugged 14-gauge steel construction, compact enclosure, polarity reverse, input pad, and high-pass filter provide the reliability and flexibility needed for professional recording environments.\u003c\/p\u003e\n\u003ch1\u003eKey Features\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-channel active direct box for stereo or dual-mono sources.\u003c\/li\u003e\n\u003cli\u003eProprietary low-noise analog circuit with 109dB dynamic range.\u003c\/li\u003e\n\u003cli\u003eHigh-voltage switching supply provides up to 9V signal handling.\u003c\/li\u003e\n\u003cli\u003eMaintains stereo separation with low crosstalk between channels.\u003c\/li\u003e\n\u003cli\u003eInput pad, 180° polarity reverse, ground lift, and high-pass filter.\u003c\/li\u003e\n\u003cli\u003eRugged 14-gauge steel chassis and outer shell.\u003c\/li\u003e\n\u003cli\u003ePowered by 48V phantom power.\u003c\/li\u003e\n\u003cli\u003eCompact design for stage, studio, and touring applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eIdeal For\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eStereo keyboards and synthesizers.\u003c\/li\u003e\n\u003cli\u003eDigital and analog keyboards.\u003c\/li\u003e\n\u003cli\u003eBass guitars and acoustic instruments.\u003c\/li\u003e\n\u003cli\u003eDual-instrument setups.\u003c\/li\u003e\n\u003cli\u003eProfessional live sound systems.\u003c\/li\u003e\n\u003cli\u003eRecording studios and broadcast applications.\u003c\/li\u003e\n\u003cli\u003eStereo sources requiring high headroom and low distortion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eWhat's in the Box\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eRadial J48 Stereo active direct box.\u003c\/li\u003e\n\u003cli\u003eProduct documentation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eInputs \u0026amp; Outputs\u003c\/h1\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 2.\u003c\/li\u003e\n\u003cli\u003eInput Connectors: 2 × 1\/4-inch input and thru connections.\u003c\/li\u003e\n\u003cli\u003eOutput Connectors: 2 × XLR.\u003c\/li\u003e\n\u003cli\u003eInput Impedance: 220kΩ via 1\/4-inch input.\u003c\/li\u003e\n\u003cli\u003eOutput Impedance: 600Ω via XLR output.\u003c\/li\u003e\n\u003cli\u003eMaximum Input: +10dBu.\u003c\/li\u003e\n\u003cli\u003ePower: 48V phantom power.\u003c\/li\u003e\n\u003cli\u003eControls\/Functions: Input pad, 180° polarity reverse, ground lift, and high-pass filter.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch1\u003eHow the J48 Stereo Compares\u003c\/h1\u003e\n\u003cp\u003eThe J48 Stereo combines two active DI channels, high-voltage signal handling, stereo separation, and rugged steel construction in a compact format. Its increased internal rail voltage is particularly suited to high-output instruments and stereo keyboards that can exceed the headroom available from conventional active direct boxes.\u003c\/p\u003e\n\u003ch1\u003eFrequently Asked Questions\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Radial J48 Stereo a stereo direct box?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The J48 Stereo features two independent active DI channels that can handle a stereo source such as a keyboard or two separate instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat type of power does the J48 Stereo require?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe J48 Stereo operates on 48V phantom power supplied by the connected mixing console, audio interface, or other compatible equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the dynamic range of the J48 Stereo?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe J48 Stereo provides 109dB of dynamic range, helping maintain clean and detailed audio with high-output instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the J48 Stereo be used with two separate instruments?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Its two-channel design allows it to function as two independent direct boxes, making it suitable for dual-instrument setups such as two basses or other instruments.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the J48 Stereo suitable for high-output keyboards?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. Its high-voltage switching supply provides increased headroom for high-output digital and analog keyboards, synthesizers, and other instruments that may overload conventional active DI boxes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat are the dimensions of the J48 Stereo?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe J48 Stereo measures approximately 3.3 × 5.0 × 2 inches and weighs approximately 1.55 lbs, providing a compact solution for stage and studio setups.\u003c\/p\u003e\n\u003ch1\u003eFull Technical Specifications\u003c\/h1\u003e\n\u003ch2\u003eAudio Performance\u003c\/h2\u003e\n\u003ctable width=\"660\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eAudio Circuit Type\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eProprietary analog circuit with low-noise op-amp\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eNumber of Channels\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e2\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eFrequency Response\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e20Hz to 20kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eDynamic Range\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e109dB\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eTotal Harmonic Distortion\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e0.002% @ -5dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eIntermodulation Distortion\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e0.003% @ -3dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePhase Deviation\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e+10° at 20Hz \/ 0° at 1kHz \/ -1° at 20kHz\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eEquivalent Input Noise\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e-103dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eNoise Floor\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e-99dB below 0dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eMaximum Input\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e+10dBu\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eInput \u0026amp; Output\u003c\/h2\u003e\n\u003ctable width=\"660\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eInput Impedance\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e220kΩ - 1\/4\" input\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eOutput Impedance\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e600Ω - XLR output\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eInput Connectors\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e2 x 1\/4\" input and thru\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eOutput Connectors\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e2 x XLR\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eInput Pad\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eIncluded\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePolarity Reverse\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e180°\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eGround Lift\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eIncluded\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eHigh-Pass Filter\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eIncluded\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePower \u0026amp; Signal Handling\u003c\/h2\u003e\n\u003ctable width=\"660\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePower\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e48V phantom power\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePower Supply Design\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eProprietary digital switching\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eMaximum Internal Signal Handling\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eUp to 9V\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eSignal Type\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eStereo or two independent instrument channels\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eHeadroom Design\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eHigher-voltage internal rails for improved signal handling\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eConstruction \u0026amp; General\u003c\/h2\u003e\n\u003ctable width=\"660\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eConstruction\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e14-gauge steel chassis and outer shell\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eOperating Conditions\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eDry locations only\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eOperating Temperature\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e5°C to 40°C\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003ePart Number\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003eR800 3002 00\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003ePhysical Specifications\u003c\/h2\u003e\n\u003ctable width=\"660\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eProduct Dimensions (L x W x D)\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e3.3\" x 5.0\" x 2\"\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd width=\"220\"\u003e\n\u003cp\u003eProduct Weight\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd width=\"440\"\u003e\n\u003cp\u003e1.55 lbs\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Radial Engineering","offers":[{"title":"Default Title","offer_id":71382680502525,"sku":"H-RADI-J48STEREO","price":399.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0617\/2308\/3005\/files\/2119701.jpg?v=1790342832","url":"https:\/\/hollywooddj.com\/fr\/products\/radial-engineering-j48-stereo-2-channel-active-direct-box-with-48v-phantom-power","provider":"Hollywood DJ","version":"1.0","type":"link"}