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Radial Engineering ProDI
Passive Direct Box

OUR PART #:  PRODI

The Radial Engineering ProDI is a passive direct box that combines exceptional audio performance with solid dependable construction...
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ProDI with a Keyboard  Diagram
ProDI with Acoustic Guitar Diagram
ProDI with Electric Bass Diagram

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Our Price: $99.99
List Price: $115.00
You save 13%!

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Radial Engineering ProDI
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The Radial Engineering 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.

The heart of the ProDI is a custom wound Radial transformer. It features an exceptionally high 140k? 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.

This compact direct box begins with 14-gauge steel I-beam skeleton for added rigidity and Radial's unique book-end design that creates a protective zone around switches and connectors. Glass filled nylon connectors and high cycle switches combine with the mil-spec PCB and internal RF filtering to provide durability and noise-free performance. A full bottom no-slip pad provides both mechanical isolation and electrical insulation to further protect against the rigors of professional touring.

The ProDI is ideally suited for instruments such as bass guitar, active acoustics, keyboards and just about anything else. When you consider all of the features and the affordable price tag, it is no wonder the Radial ProDI has become one of the most popular direct boxes ever made.

Radial Engineering ProDI Features:

  • 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 orin the studio
  • Transformer: Eclipse ET-DB2, 12:1 ratio
  • Shield: Faraday, MuMETAL® can
  • Input pad: -15dB 
  • Ground lift: Disconnects pin-1 at XLR output
  • XLR configuration: AES standard (pin-2 hot)
  • Connectors: 1/4" in & thru, XLR-M out

Radial Engineering 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
  • Construction: 14 gauge steel chassis and outershell
  • Finish: Durable powder coat
  • Size (W x H x D): 70 x 108 x 44mm (2.75” x 4.25” x1.75")
  • Weight: 0.54kg (1.2lbs)
  • Shipping size: W x H x D: 102 x 76 x 165mm (4.00x  3.00  x 6.50")
  • Shipping weight: 0.61 kg (1.35 lbs)
  • Power: Passive, no power required
  • Conditions: For use in dry locations only between 5°Cand 40°C
  • Warranty: Radial 3-year, transferable
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