The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. Unlike an active DI that is limited by the buffering amplifier's rail voltage, the JDI employs a Jensen audio transformer as the engine. Jensen transformers are legendary in their ability to gracefully handle transients while delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase deviation, the JDI delivers the natural, pure sound of the instrument without artifact.
The 100% passive circuitry inside the JDI is incredibly efficient. The transformer performs both high-to-low impedance conversion and signal balancing at the same time with minimal loading and does so without any power whatsoever. The transformer also introduces a magnetic bridge that passes signal while rejecting stray DC voltage. This makes the JDI particularly adept at eliminating hum and buzz caused by ground loops.
Radial JDI Features
- Jensen Transformer equipped passive DI
- Eliminates hum and buzz from ground loops
- Virtually zero phase & harmonic distortion
- Exceptional signal handling and noise rejection
- Input pad, Mono Sum, 180° polarity reverse, Ground lift, Speaker filter
- JDI Passive Direct Box1
- Three Year Warranty, transferable1
- Audio circuit typePassive, transformer based
- TransformerJT-DB-EPC
- Number of channelsSingle channel (mono)
- Frequency response20Hz ~ 20KHz (± 0.2dB)
- Dynamic range135dB
- Total harmonic distortion0.05% from 20Hz ~ 20kHz @-10dB
- Phase Deviation0.3° @ 100Hz; 3° @ 20Hz
- Input Impedance140k Ohms, unbalanced
- Output Impedance150 Ohms, balanced
- Maximum Input+21dB @ 20Hz ~ 20kHz
- Construction14 gauge steel chassis & outer shell
- FinishDurable powder coat
- Dimension (LxWxD) 5x3.3x1.8" (127x84.1x45.5mm)
- Weight1.55 lbs (703 grams)
- Shipping size (LxWxD)6.5x4x3" (165x102x76mm)
- Shipping weight1.92 lbs (870.9 grams)
- PowerPassive, no power required
- ConditionsFor use in dry locations only between 5°C and 40°C
