Close

JDI Specifications

The Radial JDI is a phase coherent, passive direct box employing a nickel laminated Jensen® audio transformer with virtually zero phase distortion, huge dynamics handling and ruler flat response from 10Hz to 40kHz. The Radial JDI is quite simply the world’s finest passive direct box. With its heavy-duty steel shell and internal I-beam construction, the JDI is designed to work dependably for years in even the harshest of touring environments. Ideal for keyboards, bass and acoustic instruments of all kinds, the JDI Duplex and JD6 are also available for stereo and multi-channel applications.

Green Report

The Radial Green Report is a comparison report that looks at four popular direct boxes in professional touring, studio and broadcast.

View PDF
Specifications
Audio circuit type: Passive, transformer based
Transformer: JT-DB-EPC
Number of channels: Single channel (mono)
Frequency response: 20Hz ~ 20KHz (± 0.2dB)
Dynamic range: 135dB
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
Maximum Input: +21dB @ 20Hz ~ 20kHz
Features
Input pad, Mono Sum, 180° polarity reverse, Ground lift, Speaker filter
General
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

Frequency Response

What do these graphs mean? Learn what to look for and why it matters.

Learn More

JDI Resources

Part no: R800 1010 00