Radial Engineering J48 Stereo Phantom Powered Active Direct Box with Dual-Channel High-Headroom Design and Transformer-Isolated Outputs

The Radial Engineering J48 Stereo is a professional dual-channel active direct box designed for high-fidelity stereo signal conversion in demanding live sound, studio, and broadcast environments. Built on the proven J48 platform, it delivers exceptional headroom, ultra-low distortion, and pristine signal clarity for stereo instruments and line-level sources.

Each channel features a high-performance active circuit powered by 48V phantom power, ensuring consistent operation without batteries while maintaining outstanding dynamic range. This allows the J48 Stereo to handle strong transients and complex stereo signals from keyboards, acoustic instruments, and effects processors without clipping or tonal degradation.

Transformer-isolated balanced outputs provide clean, noise-free signal transmission to mixers, recording interfaces, and PA systems, while helping eliminate ground loops and interference in complex setups. A built-in high-pass filter helps reduce unwanted low-frequency rumble and stage noise, improving overall clarity and mix definition.

Housed in a rugged steel enclosure, the J48 Stereo is built for professional touring and studio environments where reliability and audio integrity are critical.

Key Features:

• Dual-channel active stereo direct box for professional use
• Powered by 48V phantom power (no batteries required)
• High-headroom active circuitry for clean, transparent audio
• Transformer-isolated balanced outputs for noise-free signal transfer
• Built-in high-pass filter for rumble and low-frequency control
• Designed for stereo instruments, keyboards, and multi-output sources
• Exceptional clarity and dynamic range performance
• Rugged steel chassis for touring and studio durability