Radial Engineering J33 Turntable Preamp and Direct Box with RIAA EQ, Ground Lift, and Balanced Output Isolation

The Radial Engineering J33 is a professional turntable preamp and direct box designed to connect vinyl turntables to modern audio systems with clean, accurate signal conversion. Built specifically for DJ, broadcast, and studio applications, it provides proper RIAA equalization for dynamic phono cartridges, ensuring faithful reproduction of vinyl playback with correct tonal balance.

At its core, the J33 features a high-quality phono preamplifier that applies precise RIAA EQ correction, restoring the natural frequency response of vinyl records before converting the signal to a balanced, low-noise output. This makes it suitable for feeding mixers, PA systems, recording interfaces, and broadcast equipment without loss of clarity or detail.

The unit includes transformer-isolated balanced outputs to minimize hum, ground loops, and interference—common issues when connecting turntables to professional audio gear. A ground lift switch further improves noise rejection in complex setups, ensuring clean and stable performance.

Housed in a rugged steel chassis, the J33 is built for professional use in demanding environments while maintaining simple, plug-and-play operation.

Key Features:

• Professional turntable preamp and direct box
• RIAA EQ for accurate vinyl frequency correction
• Designed for dynamic phono cartridge turntables
• Transformer-isolated balanced outputs for noise-free signal transfer
• Ground lift switch for hum and interference reduction
• Converts phono signal to line-level balanced output
• Ideal for DJ, broadcast, and studio applications
• Rugged steel enclosure for touring and installation durability