Radial JDI Stereo - Premium Passive Direct Box
The Professional Standard for Pure, Two-Channel Audio
The Radial JDI Stereo is a high-performance, two-channel passive direct box designed for the most demanding live concert, touring, and professional recording applications. Featuring world-class Jensen audio transformers, the JDI Stereo is engineered to handle extreme signal levels without distortion, delivering the natural, pure sound of your instrument with warmth and character. Its passive, no-power-required design makes it an incredibly reliable tool for eliminating hum and buzz while providing unmatched audio fidelity.
Key Features & Benefits
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World-Class Jensen Transformers: At the heart of the JDI Stereo are two premium Jensen JT-DB-EPC transformers. These are renowned for delivering a smooth, warm-sounding Bessel curve reminiscent of the finest vintage gear, with virtually zero phase or harmonic distortion.
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Complete Hum and Buzz Elimination: The passive, transformer-based design creates a magnetic bridge that balances the signal and rejects stray DC voltage. This makes the JDI Stereo exceptionally effective at eliminating noise caused by ground loops.
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Handles Extreme Signal Levels: Confidently connect high-output sources like active basses, keyboards, laptops, and drum machines. The JDI Stereo gracefully handles extreme transients without choking or distorting the signal.
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Pristine Audio Fidelity: With a ruler-flat frequency response from 10Hz to 40kHz, the JDI Stereo preserves the natural, pure sound of your instrument without adding any unwanted coloration or artifacts.
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Built for the Road: A heavy-duty 14-gauge steel chassis and internal I-beam construction protect the sensitive electronics from the rigors of touring, ensuring dependable performance year after year.
Ideal Applications
The JDI Stereo is the perfect solution for any situation requiring two channels of clean, isolated signal:
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Keyboards & Laptops: Send a full stereo signal from your keyboard, digital piano, or laptop computer to the PA system with warmth and clarity.
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Acoustic & Bass Guitars: Connect two separate acoustic guitars or basses, preserving their rich, natural tone while eliminating ground loop hum between your amp and the PA.
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DJ Mixers & Media Players: Gracefully handle the high output levels from DJ equipment without distortion, delivering a clean signal to the main sound system.
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Studio Recording: Capture the purest possible signal from your instruments directly into your recording interface.
Full Technical Specifications
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Audio circuit type: Passive, transformer based
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Transformer: Jensen JT-DBE
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Number of channels: 2 (Dual Mono)
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Frequency response: 20Hz ~ 20KHz (± 0.2dB)
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Dynamic range: 135dB
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Maximum Input: +21dB
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Total harmonic distortion: 0.05% from 20Hz ~ 20kHz @ -10dB
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Phase Deviation: 0.3° @ 100Hz; 3° @ 20Hz
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Input Impedance: 140k Ohms, unbalanced
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Output Impedance: 150 Ohms, balanced
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Input Connectors: 2 x 1/4" Unbalanced
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Output Connectors: 2 x XLR Balanced Out, 2 x 1/4" Thru
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Features: -15dB Input pad, Ground lift
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Power: Passive, no power required
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Construction: 14 gauge steel chassis & outer shell
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Size (L x W x D): 5" x 3.3" x 1.8" (127mm x 84.1mm x 45.5mm)
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Weight: 1.55 lbs (703 grams)
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Warranty: Radial 3-year, transferable