top of page
Radial JDI Duplex - Premium Stereo Passive DI Inputs: 1/4", 3.5mm, RCA & XLR

The JDI Duplex is a high performance 2-channel passive direct box designed for enhanced connectivity for any application, with numerous input connector types and premium Jensen transformers for exceptional audio performance.


Radial JDI Duplex is a high performance dual-channel direct box that is designed to provide maximum flexibility for the audio engineer in the most demanding applications. It features two custom-made nickel laminated transformers for optimal signal transfer with absolute minimal distortion of all types. Analysis reveals an exceptionally linear response from 10Hz to 40kHz with virtually zero phase shift at all critical frequencies. The excellent performance is further substantiated with a Fast Fourier transform that produces desirable even order harmonic generation and a warm Bessel curve when pushed hard. With its heavy-duty steel shell and internal I-beam construction, the Duplex is designed to work dependably for years in the harshest of touring environments. A full complement of connectors make the Duplex a God-send when faced with the never-ending challenges of professional touring, broadcast and AV integration.


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
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
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
Warranty:Radial 3-year, transferable

Radial JDI Duplex - Premium Stereo Passive DI Inputs: 1/4", 3.5mm, RCA & XLR

$869.00 Regular Price
$699.00Sale Price
GST Included
Only 2 left in stock
    bottom of page