Radial Engineering J48 – Mono Active DI for Maximum Headroom & Transparent Tone

The Radial Engineering J48 is a premium single-channel active DI box built for professional musicians, engineers, and touring setups. Designed specifically for active acoustic guitars, basses, and high-output instruments, the J48 uses 48V phantom power to generate a higher internal rail voltage, giving it exceptional headroom and the ability to handle transients up to 9V without distortion. The result is a clean, natural sound that preserves the true character of your instrument on stage or in the studio.

Key Features

• High-headroom active design: Phantom-powered circuit provides exceptional dynamic range and low distortion.
• Handles hot signals: Ideal for active pickups, acoustic preamps, and high-output instruments.
• Pro touring construction: 14-gauge steel with Radial’s bookend design for maximum durability.
• Essential controls: Includes -15 dB pad, ground lift, 180° polarity reverse, and Merge (stereo-to-mono) switch.
• Noise-free performance: Transformer isolation minimizes hum and buzz in challenging stage environments.

Customer Benefits

With its high internal headroom and pristine signal path, the J48 ensures your instrument always sounds full, open, and dynamic. It prevents overloading, maintains clarity with active pickups, and withstands the demands of touring and live production.

Quick Specs

• Type: Active mono DI
• Power: 48V phantom power (no batteries required)
• Max Signal Handling: Up to 9V transients
• Controls: Pad (-15 dB), Merge, Ground Lift, 180° polarity
• Inputs: 1 × 1/4" Hi-Z input + Thru
• Output: Balanced XLR
• Construction: 14-gauge steel, bookend protective frame
• Warranty: 3-year transferable

What’s in the Box

• Radial Engineering J48 (Mono)
• User documentation

Use Cases / Ideal For

Active acoustic guitars, basses, keyboards, acoustic preamps, on-stage DI solutions, studio tracking, and professional touring rigs.

Compatibility

Works with any mixer or interface providing 48V phantom power. Suitable for live sound, studio recording, broadcast, and rental setups.

Pros & Cons

✅ Pros:

• Industry-leading headroom and clarity
• Extremely durable construction for touring
• Ideal for active pickups and hot signals
• Merge function supports stereo-to-mono instruments

⚠️ Cons:

• Requires phantom power—no battery option
• More expensive than basic direct boxes

The Radial J48 delivers pristine tone, unmatched headroom, and road-ready reliability—available now at Soundium.