{"product_id":"radial-usb-pro-audio-utility-carts-and-accessories","title":"Radial USB-PRO Stereo USB Laptop DI Box (Used)","description":"\u003cdiv style=\"background-color:#fff8e1;border-left:4px solid #f57c00;padding:12px 16px;margin-bottom:16px;\"\u003e\n  \u003cstrong style=\"color:#e65100;\"\u003eCondition: Used — Backline \/ B-Stock\u003c\/strong\u003e\u003cbr\u003e\n  This is a pre-owned Radial USB-PRO in working condition. The unit may show cosmetic signs of prior use including light scuffs, scratches, or rack wear on the chassis. All functions have been tested and verified operational. Original packaging and accessories may not be included unless specifically listed below. Sold as-is with no manufacturer warranty.\n\u003c\/div\u003e\n\u003ch2\u003eUsed Radial USB-PRO Stereo USB DI Box for Laptop Audio Playback\u003c\/h2\u003e\n\u003cp\u003eThe Used Radial USB-PRO Stereo USB DI Box converts digital audio from a laptop or computer into two balanced XLR outputs, giving engineers a clean, ground-isolated signal path from a USB source to a PA system, mixing console, or powered speakers. Featuring a 24-bit DAC, auto-sensing sample rates, and plug-and-play operation with no drivers required, the USB-PRO handles playback duties reliably in both live sound and studio environments.\u003c\/p\u003e\n\u003cp\u003eThis pre-owned unit is a strong fit for venues, houses of worship, AV integrators, and touring engineers searching for an affordable stereo USB DI for live sound without sacrificing Radial's signature build quality. It also serves well as a dedicated playback interface for DJs, presenters, and musicians running backing tracks — anyone who needs to buy a used Radial USB-PRO DI box rather than invest in a new unit gets the same professional audio path at a reduced cost.\u003c\/p\u003e\n\u003cp\u003eRadial's book-end chassis and I-beam construction protect the internal circuitry from the abuse of transport and stage use, while the full-bottom no-slip pad provides mechanical isolation and electrical insulation on any surface. The USB-PRO integrates seamlessly with microphone preamplifiers, analog consoles, and digital mixers, and is recognized automatically as a sound card under Windows and macOS — a proven workflow trusted by audio professionals for laptop direct injection.\u003c\/p\u003e\n\u003ch3\u003eKey Features of the Radial USB-PRO USB DAC DI Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e24-Bit Digital Audio Converter:\u003c\/strong\u003e Delivers high-resolution digital-to-analog conversion so playback audio reaches the PA or console without the fidelity loss typical of consumer-grade laptop outputs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDriverless Plug-and-Play Operation:\u003c\/strong\u003e Appears automatically as an available sound card in Windows and macOS audio settings, eliminating setup delays before a show or session.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBalanced Stereo XLR Outputs:\u003c\/strong\u003e Low-impedance Lo-Z outputs with switchable isolation allow long cable runs to front-of-house consoles without introducing noise or signal degradation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGround Lift Switches:\u003c\/strong\u003e Side-access ground lift eliminates hum and buzz caused by ground loops between the laptop and the house audio system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMono-Sum Switch:\u003c\/strong\u003e Combines the stereo signal to mono for quick phase checking or feeding single-channel playback systems.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3.5mm Headphone Monitor Output:\u003c\/strong\u003e Lets engineers verify signal quality and content locally before sending audio to the main system.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBook-End Chassis with I-Beam Construction:\u003c\/strong\u003e Protects internal components from impact and keeps the PCB stable under the stress of touring.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull-Bottom No-Slip Pad:\u003c\/strong\u003e Provides mechanical isolation and electrical insulation when placed on metal racks, stages, or amplifier tops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAudio Circuit Type:\u003c\/strong\u003e Custom decoder with analog line drive\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUSB Compliance:\u003c\/strong\u003e USB 2.0 full speed\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBit Depth:\u003c\/strong\u003e 24-bit (16-bit capable)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSampling Rate:\u003c\/strong\u003e 44.1 kHz \/ 48 kHz \/ 96 kHz auto-sensing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSound File Compatibility:\u003c\/strong\u003e WDM, MME, CoreAudio, DirectSound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSoftware Compatibility:\u003c\/strong\u003e Windows XP \/ Vista \/ 7 \/ 8 and Mac OS\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFrequency Response:\u003c\/strong\u003e 5 Hz – 40 kHz (30 Hz – 18 kHz with isolation)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDynamic Range:\u003c\/strong\u003e \u0026gt;90 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNoise Floor:\u003c\/strong\u003e -90 dB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Gain:\u003c\/strong\u003e +8 dBu\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTotal Harmonic Distortion:\u003c\/strong\u003e 0.01%\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStereo Separation:\u003c\/strong\u003e 75 dBu\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Impedance:\u003c\/strong\u003e 300 Ohm nominal\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"background-color:#f5f5f5;border:1px solid #ccc;padding:10px 14px;margin-top:16px;font-size:0.9em;\"\u003e\n  \u003cstrong\u003eAll Sales Final.\u003c\/strong\u003e This used item is sold as-is with no returns, exchanges, or manufacturer warranty. Please review all specifications, condition notes, and included accessories before purchase.\n\u003c\/div\u003e","brand":"Radial","offers":[{"title":"Default Title","offer_id":46112418037957,"sku":"RAD-ACC-USBPRO-BB","price":260.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0630\/3085\/3829\/files\/9a223803bb95075fdc07164381c0e4df.jpg?v=1776813175","url":"https:\/\/avlgear.com\/products\/radial-usb-pro-audio-utility-carts-and-accessories","provider":"AVLGEAR","version":"1.0","type":"link"}