



The Radial J48 Stereo is the professional active direct box you can rely on whether you're touring stages or laying down tracks for your next EP. Using the same signal path that made the original J48 a world-standard on concert equipment riders, the J48 Stereo delivers two channels of input, two channels of output, and sound-shaping-at-the-source control. It’s an excellent choice for keyboard, guitar, and bass players running stereo rigs or multiple instruments. With rugged steel construction on the outside and Radial’s award-winning engineering on the inside, your J48 Stereo is built to perform flawlessly for countless gigs to come.
The J48 Stereo is a high-performance 2-channel active direct box designed for live touring and professional studio environments. It effortlessly handles extreme transients without distortion while preserving the true, natural sound of your instrument.
Most battery-powered instruments and stereo keyboards can produce up to 7 volts at maximum volume — enough to overload typical active DIs limited to around 3 volts. The J48 Stereo uses a unique switching power supply that increases the internal rail voltage, allowing it to handle up to an impressive 9 volts. This expanded headroom dramatically reduces distortion and maintains the natural tone and detail of your instrument. Independent left/right channel separation ensures clean performance whether you're running stereo keyboards or two separate instruments.
The J48’s active circuitry and outstanding signal handling make it a top choice for both digital keyboards and vintage analog synths. A built-in pad is available when you need to tame hotter signals.
The compact design makes it easy to connect two guitars or basses using a single direct box. The J48’s active circuit delivers sound quality rivaling DIs priced many times higher.
Thanks to its low crosstalk, the J48 Stereo excels when switching between completely different instruments. It's an ideal solution for doubling between bass, acoustic guitar, fiddle, mandolin, and more.