Radial ProDI

$134.99
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Radial ProDI Passive Direct Box - Compact Rugged DI

The Radial ProDI is a high-performance, ultra-compact passive direct box designed for live touring and studio use, delivering clean, natural instrument tone without distortion. Featuring a custom-wound Radial transformer, it handles high signal levels with minimal phase shift and a smooth 20 Hz–18 kHz response, eliminating hum and ground loops via electrical isolation. Ideal for guitars, basses, and keyboards, the ProDI's rugged steel enclosure and internal I-beam construction withstand the toughest gigs, making it a reliable workhorse for musicians and engineers.

Custom Transformer Clarity

The ProDI's custom transformer provides exceptional linearity and subtle peak limiting, preserving the source's character while rejecting noise from long cable runs. Its passive design requires no power, ensuring consistent performance, and the compact footprint fits easily in pedalboards or racks.

Key Features of the Radial ProDI

  • Passive DI with custom Radial transformer
  • Handles high-output signals without distortion
  • 20 Hz–18 kHz frequency response with minimal phase shift
  • No batteries or phantom power required
  • Eliminates hum and buzz from ground loops
  • Rugged 14-gauge steel chassis with I-beam design
  • 1/4" TS input to XLR output
  • Full bottom no-slip pad for isolation
  • Ideal for guitars, basses, and keyboards
  • 3-year transferable warranty

Technical Specifications

  • Type: Passive direct box
  • Input: 1/4" TS instrument
  • Output: XLR balanced
  • Frequency Response: 20 Hz–18 kHz (±1 dB)
  • Max Input Level: +18 dBu
  • Transformer: Custom Radial
  • Power: None (passive)
  • Dimensions: 4.25 x 2.75 x 1.75 in (108 x 70 x 44 mm)
  • Weight: 1.2 lbs (0.54 kg)
  • Warranty: 3-year transferable
Our ONE WITH EVERYTHING ZEN WARRANTY extends the standard manufacturer warranty by one year, see our ZEN WARRANTY page for details.