Radial Intros JD6 Direct Box

Nov 18, 2003 12:00 PM, Editors


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The Radial JD6 6-channel, rackmountable direct box is a single-rackspace DI that uses Jensen Transformers to convert the high impedance from keyboards and drum machines to a balanced, low-impedance mic level for use in concert snake systems.

At 20 Hz, the JD6 measures in at less than 0.006% distortion and 4º deviation.

The JD6’s passive transformer design provides 100% electrical isolation between the input source and output, eliminating problems such as hum and buzz. For the system designer, a series of internal ground switches allow each channel to “float” or be configured in a star ground to the chassis. A separate ground lug is provided on the rear panel to bond the JD6 chassis to a rack. A further ground option allows channel 1 to serve as a common chassis ground with an easy-access side button.

To simplify interfacing with computer sound cards, DVDs and other electronic media equipment, the first two channels of the JD6 are outfitted with additional jacks and features, including ¼-inch switching jacks with front panel priority that, when connected, the signal is re-routed from the usual rear connections to the front like a studio patchbay. The ¼-inch jacks feature an innovative merge function that converts the input and thru-put into a left-right to mono-resistive mix. Two RCA connectors are accessed with a push-button, allowing channels 1 and 2 to work double-duty. These are premerged to sum mono for use with CD players or other media. A lowpass filter is also provided to reduce high-frequency noise caused by CRT screens or when interfacing with vintage gear that tends to be noisy.

All six channels feature XLR pin-1 ground lift, 180º polarity reverse to interface with old pin-3 “hot” gear and a -20dB pad for excessive input levels. The JD6 is made of 14-gauge welded steel and finished in a baked-enamel coat. A series of write-able labeling zones on both the front and rear panel make identifying channels easy. Rear panel connections include Input, Thru and XLR output. All connectors are isolated to eliminate noise and cross talk.

For more information, visit www.radialeng.com. For more sound reinforcement products, visit mixonline.com/live_sound_products/index.htm.

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