JDI™ Stereo Specifications

The Radial JDI Stereo is a two channel passive direct box that is equipped with two Jensen audio transformers. These amazing devices not only balance the signal, but also lower the impedance to allow long cable runs without noise. Each transformer features a unique nickel core stack, proprietary winding technique, dual faraday shields to eliminate high frequency noise, and a protective outer MuMETAL® can to protect against external fields. This results in exceptionally low distortion of all types while being able to handle extreme transients at all frequencies. With its heavy-duty steel shell and internal I-beam construction, the JDI Stereo is designed to work dependably for years in even the harshest of touring environments. The JDI Stereo is quite simply the world's finest passive stereo direct box.

Radial JDI Block Diagram
Radial JDI Frequency Response
Radial Green Report

The Radial Green Report In effort to provide the more discerning audio engineer with all of the technical support materials to make a proper and informed decision, we have produced the Radial Green Report. This provides in-depth distortion tests and analysis of four popular direct boxes....     View the pdf
Specifications    RADIAL JDI
Audio circuit type:  Passive, transformer based
Number of channels: Two channels (dual mono)
Frequency response:  20Hz ~ 20KHz (± 0.2dB)
Dynamic range:  135dB 
Maximum input:  +21dB @ 20Hz ~ 20kHz 
Total harmonic distortion:  0.05% from 20Hz ~ 20kHz @-10dB
Phase deviation:  0.3° @ 100Hz; 3° @ 20Hz 
Input impedance:  140k Ohms, unbalanced 
Output impedance:  150 Ohms, balanced 
Transformer: Jensen JT-DBE
Shield: Dual Faraday, MuMETAL® 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: Durable powder coat
Size: (L x W x D) 5" x 3.3" x 1.8" (127mm x 84.1mm x 45.5mm)
Weight:  1.55 lbs (703 grams)
Shipping size: L x W x D 6.5" x 4" x 3" (165mm x 102mm x 76mm)
Shipping weight: 1.92 lbs (870.9 grams)
Power:  Passive, no power required 
Conditions: For use in dry locations only between 5°C and 40°C
Warranty:  Radial 3-year, transferable
Specifications are subject to change without notice.
MuMETAL® is a registered trademark of Magnetic Shield Corp.
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