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Radial ProDI Mono Passive DI Box
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Radial ProDI Mono Passive DI Box

Product Code: 403560

The ProDI™ is a passive direct box that combines exceptional audio performance with solid dependable construction, making it the ideal general duty direct box for stage and studio.

£93.00 (INC VAT)
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Radial ProDI Mono Passive DI Box

The heart of the ProDI is a custom wound Radial transformer. It features an exceptionally high 140kΩ input impedance to reduce loading while enabling the ProDI to handle extreme signal levels at all frequencies without distortion. This is further improved upon with an internal MuMETAL® shield to protect against electromagnetic fields that can cause unshielded transformers to distort.




  • Compact passive direct box for stage and studio
  • Able to handle huge transients without distortion
  • Transformer isolation eliminates noisy ground loops
  • Plug and play easy to use feature set – on stage or in the studio




ProDI with electric bass

  • The ProDI works great for high output devices like active bass guitars. It's able to handle the huge signal levels from active pickups without distortion and the transformer isolation prevents ground loop hum. The ProDI sends the pure sound of the bass to the PA and to the player's amp.


ProDI with acoustic guitar

  • Acoustic guitars can sometimes have sharp sounding active preamps. The ProDI naturally smoothes out the transients for a warmer tone. And because the ProDI is able to handle loud signals from active pickups, it will not distort. This makes it a great direct box for acoustic guitars.


ProDI with a keyboard

  • Today's digital keyboards are not only very dynamic, they also have a tremendous range from low to high notes. The ProDI is able to withstand excessive signal levels at all frequencies without introducing distortion or phase shift, so all your patches sound great.
  • * Audio circuit type: Passive, transformer based
  • * Transformer: Eclipse ET-DB2, 12:1 ratio
  • * Number of channels: Single channel (mono)
  • * Frequency response: 20Hz ~ 18.5KHz (± 0.2dB)
  • * Dynamic range: 128dB
  • * 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
  • * Maximum Input: +18dB @ 20Hz
  • * Construction: 14 gauge steel chassis & outer shell
  • * Size (L x W x D): 108 x 70 x 44mm
  • * Weight: 0.54kg
  • * Power: Passive, no power required
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