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.
Specifications
Block Diagram
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| 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
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