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The Radial JDI passive direct box is the kind of premium-quality direct tool you need for great sound and rock-solid reliability on stages and studios anywhere. The Radial JDI features a Jensen isolation transformer to give you the best performance possible at all frequencies. This box can handle very high signal levels without distorting, and its passive design helps to eliminate 60-cycle ground loops. Great for everything from passive and active guitars and basses to analog and digital keyboards, the Radial JDI is a dependable, quality performer!
Radial JDI at a Glance:
Jensen transformer for optimum performance
The JDI's Jensen transformer is the product of decades of experience in transformer production. This transformer delivers optimum audio performance offering outstanding linearity at all frequencies, combined with extraordinary level handling without introducing distortion.
The input panel features a 1/4" instrument input and traditional thru-put. An innovative 'merge' function allows the thru-put to be converted to a second input to allow stereo to mono summing. This is often used to interface stereo sources such as keyboards or CD players in live shows where audio channels may be not always be plentiful. The JDI also sports a -15dB pad to interface with higher output levels.
The JDI's output panel features balanced 600-ohm XLR connector with pin-2 hot following the AES specification. A polarity reverse switch toggles pin-2 and pin-3 to allow the JDI to interface with older non-AES equipment and for creative tinkering. The ground lift switch disconnects the XLR pin-1 ground from the JDI for 100% input-to-output isolation.
Finally, a second -30dB pad may be engaged that, when used in tandem with the -15dB input pad, allows the JDI to be connected in parallel with a speaker. This, for instance, allows the engineer to 'tap' the sound coming from a guitar amplifier speaker 'post distortion' thus adding another creative dimension. This unique function incorporates a speaker emulation filter circuit that rolls off highs and lows to more closely approximate the sound of a 12" driver.
As with all Radial direct box, the Radial JDI is designed for use in abusive environments such as on fast-paced stages of concert touring. An innovative book-end design provides a protective zone around the switches and connectors that makes it practically impossible to damage these components.
The inner skeletal frame features a unique 14-gauge welded I-beam construction that makes it impossible to torque the PC board. Stress on the printed circuit board can introduce intermittent solder joints, which by all accounts is the primary cause of direct box failure.
An innovative full-bottom no-slip rubberized pad works double duty by assuring the J48 won't slip and slide around when placed on an amplifier. The protective pad also ads an element of electrical shock resistance by providing a mechanical shield from guitar amp handles that are often directly coupled to the amp chassis.
Radial JDI Features:
The Radial JDI is a solid choice onstage and in the studio!