The Radial ProDI is a passive direct (DI) box that combines exceptional audio performance with a solid dependable construction, making it the ideal general duty direct box for stage and studio. At the heart of the Radial ProD2 passive DI box is a design featuring the high performance Eclipse ET-DB2 transformer. This delivers a frequency performance of 20Hz to 20kHz and is able to withstand tremendous signal levels without distortion. Unlike an active circuit that can overload when the signal exceeds the rail voltage, transformer based DI boxes saturate. This creates a pleasing effect, naturally rounding out the tone and acting like a subtle limiter-particularly beneficial when working with digital pianos, samplers and drum machines that can produce excessive dynamics.

Radial ProDI

  • Specifications

    • Audio circuit type: Passive, transformer based
    • Number of channels: Single channel (Mono)
    • Frequency response: 20Hz ~ 18.5KHz (± 0.2dB) 
    • Dynamic range: 128dB 
    • Maximum input: +18dB @ 20Hz 
    • Total harmonic distortion: 0.01% from 20Hz~20kHz @-10dB
    • Phase deviation: 1° @ 100Hz; 8° @ 20Hz 
    • Input impedance: 140k Ohms, unbalanced 
    • Output impedance: 150 Ohms, balanced 
    • Transformer: Radial RT-DBI, 12:1 ratio
    • Shield: Faraday, mu-metal can
    • Input pad: -15dB 
    • 180° polarity reverse: Inverts absolute phase
    • Ground lift: Disconnects pin-1 at XLR output 
    • XLR configuration: AES standard (pin-2 hot) 
    • Connectors: 1/4" in & thru, XLR-M out
    • Construction: 14 gauge steel chassis & outer shell
    • Finish: Baked enamel
    • Size: (W x H x D) 70 x 108 x 44mm 
    • Weight: 0.54kg
    • Power: Passive, no power required