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Radial ProDI

Passive DI Box

The Radial ProDI is a professional passive DI box designed for live sound, touring, theatre, studio recording, and broadcast applications. Combining outstanding audio performance with Radial’s renowned road-ready construction, the ProDI is one of the industry’s most trusted direct boxes for reliable signal conversion on stage and in the studio.

Key Features

  • Professional passive direct injection box

  • High-performance custom Radial transformer

  • Handles high signal levels and transients without distortion

  • Transformer isolation helps eliminate hum and ground loops

  • Plug-and-play operation with simple, reliable controls

  • Compact and rugged touring-grade steel construction

Clean, Natural Audio Performance

At the core of the ProDI is a custom-wound Radial transformer designed to deliver:

  • Smooth and natural signal transfer

  • Excellent transient handling

  • Minimal distortion at high input levels

  • Reduced loading thanks to high 140kΩ input impedance

The transformer also features an internal MuMETAL® shield to protect against electromagnetic interference and unwanted noise, making the ProDI ideal for demanding live production environments.

Built for Professional Touring

The ProDI is engineered to survive the rigours of touring and daily production use with:

  • Heavy-duty 14-gauge steel construction

  • Radial’s protective book-end chassis design

  • High-cycle switches and durable connectors

  • Internal RF filtering for quieter operation

  • Full bottom no-slip pad for electrical and mechanical isolation

Ideal Applications

The Radial ProDI is perfect for:

  • Bass guitars

  • Acoustic guitars

  • Keyboards and synths

  • Playback systems

  • DJ rigs

  • Theatre and musical productions

  • Corporate AV and live events

  • Studio recording setups

Why Use a Passive DI?

Passive DI boxes like the ProDI are especially well suited to:

  • Active instruments with strong output levels

  • Keyboards and playback devices

  • Long cable runs on stage

  • Eliminating ground loop hum and interference

Technical Highlights

  • Passive transformer-based design

  • High 140kΩ input impedance

  • Transformer isolated output

  • Ground lift switch for hum reduction

  • Rugged steel chassis construction

Why Choose the Radial ProDI

  • Industry-standard passive DI for live sound and touring

  • Reliable, transparent audio performance

  • Excellent noise rejection and isolation

  • Built to withstand professional production environments

  • Trusted by audio engineers worldwide for stage and studio applications

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