Radial Engineering J48 Phantom Powered Active Direct Box with High-Headroom Active Circuit and Transformer-Isolated Balanced Output

The Radial Engineering J48 is a premium active direct box designed for professional touring, studio recording, and broadcast applications where maximum headroom and ultra-clean signal transfer are essential. Widely regarded as an industry-standard active DI, it delivers exceptional clarity and dynamic range for acoustic guitar, bass, keyboards, and other instrument-level sources.

At its core, the J48 features a high-performance active circuit powered by 48V phantom power, providing significantly higher headroom than typical active DI designs. This allows it to handle strong transient signals without distortion while preserving the natural tone and dynamics of the instrument.

The unit includes a transformer-isolated balanced output for clean, noise-free transmission to mixing consoles, recording interfaces, and PA systems. A built-in high-pass filter helps reduce unwanted low-frequency rumble, stage noise, and handling vibrations, improving overall mix clarity and feedback resistance.

Built with Radial’s rugged steel chassis, the J48 is engineered for long-term durability in demanding live environments while maintaining consistent, transparent performance.

Key Features:

• Industry-standard active direct box for professional use
• Powered by 48V phantom power (no batteries required)
• High-headroom active circuit for clean, distortion-free signal handling
• Transformer-isolated balanced output for noise-free transmission
• Built-in high-pass filter to reduce rumble and low-end noise
• Exceptional clarity and dynamic range for instruments
• Ideal for acoustic guitar, bass, keyboards, and more
• Rugged steel enclosure designed for touring reliability