The Radial Engineering JDI is a passive direct box designed for live concert touring and professional studio recording applications. Featuring a premium Jensen transformer, it ensures exceptional audio performance.
At its core, the JDI utilises the Jensen JT-DB-EPC audio transformer, delivering a smooth, warm sound with a Bessel curve reminiscent of vintage gear. Its frequency response spans from 10Hz to 40kHz with virtually zero phase deviation, preserving the natural sound of the instrument without artifacts.
The JDI’s no-power passive design facilitates high-to-low impedance conversion and signal balancing, eliminating hum and buzz caused by ground loops. It accommodates various instruments, including high-output bass guitars and acoustic instruments with built-in preamps, without distortion or phase shift.
Constructed with a heavy-duty steel shell and internal I-beam construction, the JDI ensures reliability in demanding touring environments.
Specifications:
- Audio circuit type: Passive, transformer-based
- Transformer: Jensen 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 include input pad, mono sum, 180° polarity reverse, ground lift, and speaker filter.
