Radial (R800 1020) Direct Box - Passive

Stereo Direct Box

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What's in the box:

  • Radial Engineering JDI Duplex - Two Channel Professional Passive Direct Box with Jensen Transformers
  • Three (3) Year Transferable Warranty

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The Radial JDI Duplex is a full-feature, stereo passive direct box designed to enhance connectivity, reduce noise, and simplify the hectic life of the touring professional, broadcast engineer or AV integrator. It is plug-and-play easy to use while delivering the utmost sonic quality.

Like the Radial JDI, the Duplex employs two high-performance 'made in the USA' audio transformers and the same pristine audio signal path that has made the JDI the industry standard. It features exceptional signal handling with virtually zero phase shift or harmonic distortion, while remaining linear across the entire audio spectrum. When driven to extremes, the natural transformer saturation and resulting warm Bessel curve makes the Radial Duplex the perfect choice for smoothing out highly dynamic instruments such as digital pianos and electronic drums that can sound harsh when pushed. Transformer isolation provides the additional benefit of eliminating troublesome ground loops that can cause hum and buzz in the audio system or interfere with video displays.

This 'Swiss Army knife' DI is equipped with ¼" connectors for instruments, RCA connectors and a 3.5mm TRS for unbalanced -10dB consumer electronics plus XLR inputs for +4dB professional line sources. Radial's innovative book-end design provides protective zones on the front and rear to keep connectors and switches out of harm's way. The 14 gauge I-beam inner frame adds tremendous rigidity to eliminate outside stresses that could torque the PC board and cause premature solder joint and trace failure. The steel outer shell couples with the transformer's mu-metal shield to protect against stray magnetic fields from power transformers or lighting systems that could cause interference. Finally, a full-bottom no-slip pad works double-duty by providing both mechanical and electrical isolation.

Radial JDI Duplex Features:
  • Stereo direct box for high output sources
  • Ultra linear response from 10Hz to 40kHz
  • Virtually zero phase & harmonic distortion
  • Eliminates hum and buzz from ground loops

Specifications for the Radial (R800 1020) Direct Box

{ "Audio circuit type:" : "Passive, transformer based", "Transformer:" : "Jensen JT-DBE", "Number of channels:" : "2", "Frequency response:" : "20Hz ~ 20kHz at +/- 0.2dB", "Dynamic range:" : "135dB", "Total harmonic distortion:" : "0.001%; 1kHz/+4dBu; 600 Ohm load", "Phase Deviation:" : "-1° @ 20Hz; 0.5° @ 150Hz; 600 Ohm load", "Input Impedance:" : "140k Ohm PAD off; 10k Ohm PAD on", "Output Impedance:" : "600 Ohms", "Maximum Input:" : "+20dB @ 1kHz ", "Features" : { "Input pad, Mono Sum, 180° polarity reverse, Ground lift" : "", "Input Connectors:" : "1/4", RCA, 3.5mm, XLR", "Output Connectors:" : "XLR, 1/4" thru", "Extras:" : "Line Level or hi-Z input" }, "General" : { "Construction:" : "14 gauge steel chassis & outer shell", "Size (L x W x D):" : "160mm x 48 x 127mm (6.3" x 1.9" x 5") ", "Weight:" : "1kg (2.2lbs)", "Shipping size (L x W x D):" : "210 x 159 x 83mm (8.25" x 6.25" x 3.25")", "Shipping weight:" : "1.43 kg (3.15 lbs)", "Power:" : "Passive, no power required ", "Conditions:" : "For use in dry locations only between 5°C and 40°C" } }

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