JDI DUPLEX

The Radial JDI Duplex is a full-feature, stereo passive direct box designed to enhance connectivity, reduce noise, and simplify the hectic life of the touring professional, broadcast engineer or AV integrator. It is plug-and-play easy to use while delivering the utmost sonic quality.

Like the Radial JDI, the Duplex employs two high-performance Jensen audio transformers with the same pristine audio signal path that has made the JDI the industry standard. It features exceptional signal handling with virtually zero phase shift or harmonic distortion, while remaining linear across the entire audio spectrum. When driven to extremes, the natural transformer saturation and resulting warm Bessel curve makes the Radial Duplex the perfect choice for smoothing out highly dynamic instruments such as digital pianos and electronic drums that can sound harsh when pushed. Transformer isolation provides the additional benefit of eliminating troublesome ground loops that can cause hum and buzz in the audio system or interfere with video displays.

This ''''Swiss Army knife'''' DI is equipped with ¼" connectors for instruments, RCA connectors and a 3.5mm TRS for unbalanced -10dB consumer electronics plus XLR inputs for +4dB professional line sources. Radial''''s innovative book-end design provides protective zones on the front and rear to keep connectors and switches out of harm''''s way. The 14 gauge I-beam inner frame adds tremendous rigidity to eliminate outside stresses that could torque the PC board and cause premature solder joint and trace failure. The steel outer shell couples with the transformer''''s MuMETAL® shield to protect against stray magnetic fields from power transformers or lighting systems that could cause interference. Finally, a full-bottom no-slip pad works double-duty by providing both mechanical and electrical isolation. The Radial Duplex delivers outstanding connectivity, superlative audio and quiet dependable performance.

JDI Duplex… the world''''s finest passive stereo direct box.

• Stereo direct box for high output sources
• Ultra linear response from 10Hz to 40kHz
• Virtually zero phase & harmonic distortion
• Eliminates hum and buzz from ground loops

1. SUM MONO: Converts the channel IN and THRU jacks
into left and right inputs and passively mixes them to mono.
2. -15dB PAD: Reduces the input sensitivity by -15dB to
prevent distortion.
3. 180° POL: Inverts signal polarity at the XLR output by
toggling pins two and three.
4. GROUND LIFT: Disconnects pin-1 at the XLR output to
reduce noise caused by ground loops.
5. XLR SEL: Activates the +4dB XLR line input and
disconnects the ¼", RCA and 3.5mm input jacks.
6. RCA IN: Stereo input for line-level sources like CD players.
7. 3.5mm IN: For line-level sources like laptop computers.
8. BOOK-END DESIGN: Creates a protective zone around
the jacks and switches.
9. FULL BOTTOM PAD: Provides electrical insulation and
mechanical isolation.
10. XLR OUTPUT: 600 Ohm balanced mic-level output for
runs to 300m (1000'''') without noise.
11. +4dB XLR INPUT: For balanced line-level sources like
mixing consoles and pro VTRs.
12. ¼" PHONE IN: For instruments and line-level sources
like keyboards and drum machines.
13. ¼" THRU: Through-put connects to on stage amplifi er or
personal monitoring system.
14. I-BEAM REINFORCED: 14-guage steel enclosure with
rigid i-beam construction makes it impossible to torque
the PC board and eliminates cold solder joints.
15. POWDER-COATED: Durable and environmentally
friendly powder-coated fi nish for years of use.