Description
Front-of-house engineers need a DI they can trust to survive a hot line check and still sound transparent, and that’s exactly what the Radial J48 is built for. Rather than fighting the current limits of standard 48V phantom power, Radial engineered a switch-mode supply that boosts the internal rails to roughly 10 volts, so the box can accept signals up to 9V without choking on transients. Non-essential circuitry, including power-hungry LEDs, shuts down during operation so every available milliamp goes toward the audio path instead.
That extra headroom translates directly to cleaner sound: lower phase shift than many competing DIs, reduced harmonic distortion, and single-digit intermodulation numbers. On stage, the J48 offers a few features that make it genuinely useful in a busy rig. A Merge function turns the input and thru-put jacks into left/right inputs, summing stereo keyboards or playback sources to mono when your mixer is short on channels. There’s also a -15dB pad for hot line-level sources, a ground lift, and a phase reverse switch for resolving out-of-phase combinations. An 80Hz high-pass filter trims low-end mud and buys back roughly 3dB of headroom, cutting resonant feedback risk in the process.
Build quality matches the electronics — welded I-beam construction and a slide-in XLR trace keep the PC board from torquing, which is the usual culprit behind cold solder joints on the road. A military-grade board, welded steel standoffs, 14-gauge steel housing with baked enamel finish, and a no-slip bottom pad round out a box designed to survive years of load-in and load-out.
- Active, 48V phantom-powered DI with switch-mode supply for extended headroom
- -15dB pad, 80Hz high-pass filter, ground lift, and phase reverse switch
- Merge function sums stereo sources to mono at the XLR output
- Balanced 600 Ohm XLR out drives long cable runs to splitters with minimal noise
- Rugged I-beam, 14-gauge steel construction for road use
This unit is sold as a demo.
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