Radial JDI Duplex MK5 Stereo Direct Box

Analogue audio output type	balanced microphone out (XLR), thru (TS jack)
splitter	no
ground lift function	yes
PAD switch	yes

Radial JDI Duplex MK5 Stereo Direct Box
Product no: 9000-0009-9614 Bax Music Warranty: This product comes with a 3-year warranty.

General

Radial are always improving their products. When it comes the stereo DI boxes, the JDI Duplex stands alone at the top. Without risking its legendary reputation, Radial managed to give this 2-channel direct box an overhaul. The new generation of the JDI Duplex is more compact than ever and was fitted with a 3.5mm stereo input so you can also connect a laptop or tablet, for instance. Moreover, you can now also mount it in a rack.

Properties of the Radial JDI Duplex

The JDI Duplex is perfect for instruments with a low output (such as an electric guitar or bass guitar) as well as instruments with a very dynamic output (e.g. digital pianos or electronic drums). The heart of the Radial JDI Duplex is a duo of high-end insulated Jensen transformers, with an exceptional linear response of 10 Hz to 40 kHz. This direct box can handle immensely high signal levels without any distortion. What's more, thanks to its passive design, the annoying 50Hz hum is a thing of the past.

A flexible tool

Thanks to its many connections (6.3mm and 3.5mm jacks, XLR stereo and RCA inputs), you can use the Radial JDI Duplex Stereo Direct Box for lots of things, both on stage and in the studio. Additionally, there's the option to combine stereo signals into a mono signal, a ground lift, a 180-degree polarity reverse, XLR select, and -15dB pad.

Tips or comments about this product

Please note: the rack mount kit is optional!

Specifications

Product features

Sustainable product	not specified
Number of channels	2
Type of DI box	passive
Energy source	not applicable
Analogue audio input type	unbalanced line in (TS jack), unbalanced line in (RCA), unbalanced stereo line in (TRS mini-jack), balanced line in (XLR)
Analogue audio output type	balanced microphone out (XLR), thru (TS jack), thru (RCA)
Splitter	no
Ground lift function	yes
PAD switch	no

Weight and dimensions including packaging

Weight (incl. packaging)	1,5 kg
Dimensions (incl. packaging)	28,0 x 13,0 x 7,0 cm

Product specifications

passive stereo DI box
versatile and easy to use
excellent construction and a great sound
special Jensen transformers, 100% insulated to prevent ground loops
virtually zero phase and harmonic distortion
exceptional signal processing
sum - mono: converts the IN and THRU to left and right inputs to make a passive mix to mono
-15dB pad switch: reduces the input sensitivity with -15dB to prevent distortion
180-degrees polarity switch: reverses the polarity at the XLR output
ground lift switch, removes humming caused by ground loop currents
XLR Sel: activates the +4dB XLR line input and dampens the 6.3mm, RCA and 3.5mm inputs
audio circuit type: passive, based on transformers
number of channels: 2 (stereo)
frequency response: 20 Hz tot 20 kHz @ +/- 2 dB)
dynamic range: 135 dB
maximum input level: +20 dB at 1 kHz
total harmonic distortion: 0.001%; 1 kHz/+4 dBu at 600 ohms
phase deviation: -1° at 20 Hz; 0.5° at 150 Hz; 600-ohm load
input impedance (unbalanced): 140 kOhms PAD off; 10 kOhms PAD on
input impedance (balanced): 10 kOhms
output impedance (balanced MXLR): 600 ohms
shielding: Dual Faraday, mu-metal can
input PAD: -15 dB (only 6.3mm jack and RCA)
Sum Mono: Resistive summing mixer
180-degree polarity reverse: reverses pin 2 and 3 for the XLR outputs
ground lift: disconnects pin 1 for the XLR outputs
XLR configuration: AES standard (pin 2 = hot)
rugged metal housing prevents circuit board from warping
unique book-end design prevents damage to the buttons
whole bottom is fitted with insulating anti-slip layer
power supply: passive, no power required
conditions: for use in dry conditions between 5 and 40-degree Celsius only
colour: green (powder coating)
dimensions: 160 x 48 x 127 mm (6.3 x 1.9 x 5 inches)
weight: 1 kg (2.2 lbs)

Inputs:

stereo RCA per channel
3.5mm TRS mini jack for line-level devices such as laptops and tablets
+4dB XLR female (balanced) per channel
6.3mm TS jack per channel for instruments and line-level source devices such as keyboards and drum computers

Outputs: