Radial JDI

World's Finest DI

The JDI is a high performance passive direct box for live concert touring and professional studio recording applications, featuring a premium Jensen transformer for exceptional audio performance.

• Jensen Transformer equipped passive DI

• Eliminates hum and buzz from ground loops

• Virtually zero phase & harmonic distortion

• Exceptional signal handling and noise rejection

Pure Sound of the Instrument
The Radial JDI is a passive direct box designed to handle extreme signal levels without distortion of any kind. At the heart, the Radial JDI employs the world class Jensen JT-DB-EPC audio transformer delivering a smooth, warm sounding Bessel curve, reminiscent of the finest vintage gear. Ruler flat from 10Hz to 40kHz and with virtually zero phase deviation, the JDI delivers the natural, pure sound of the instrument without artifact. By its no-power passive design, the Radial JDI performs both high-to-low impedance conversion and signal balancing over a magnetic bridge that passes signal while rejecting stray DC voltage. This makes the JDI particularly adept at eliminating hum and buzz caused by ground loops.

FEATURES

-15dB PAD
Reduces the input sensitivity for active basses and high output keyboards.

Merge
Turns the input & thru jacks into a passive mixer to sum stereo signals to mono.

Input
1/4" input jack for instrument and line-level sources.

Thru
1/4" thru-put jack passes instrument's signal to stage amp. Converts to an input when "Merge" function is engaged.

XLR Out
Balanced 150Ω mic-level output wired to the AES standard with pin-1 ground and pin-2 hot.

180°
Polarity reverse used to correct the phase on old gear and reduce feedback on stage.

Ground
Disconnects pin-1 at XLR output to reduce hum and buzz caused by ground loops

Speaker
Inserts a -30dB pad and speaker emulation filter that allows the JDI to be connected in parallel with a speaker cab

Jensen Transformer
Nickel core for the best signal transfer and MuMETAL® shield for protection against EMI.

14-Gauge Steel
I-Beam construction prevents circuit board from torque which could lead to part failure.

MIL-Spec PCB
Full ground plane for noise-free performance, double sided for durability.

Metal Switches
Rated at over 20,000 cycles for added durability and years of use.

SPECIFICATIONS

Audio circuit type: Passive, transformer based
Transformer: 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: Input pad, Mono Sum, 180° polarity reverse, Ground lift, Speaker filter
Construction: 14 gauge steel chassis & outer shell
Finish: Durable powder coat
Size (L x W x D): 5" x 3.3" x 1.8" (127mm x 84.1mm x 45.5mm)
Weight: 1.55 lbs (703 grams)
Shipping size (L x W x D): 6.5" x 4" x 3" (165mm x 102mm x 76mm)
Shipping weight: 1.92 lbs (870.9 grams)
Power: Passive, no power required
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable