Radial Jdi Duplex Mk4 Stereo Direct Box With Virtually Zero Phase Shift Or Harmonic Distortion

It just might be the world's finest direct box. 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 and easy to use while delivering the utmost sonic quality. Like the Radial JDI, the Duplex employs two high-performance 'made in the USA' audio transformers and 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 mu-metal shield to protect against stray magnetic fields from power transformers or lighting systems that could cause interference.

The Radial JDI Duplex Mk4 is a high-quality stereo direct box designed to deliver pristine sound with virtually zero phase shift or harmonic distortion. It’s engineered for professional audio applications where maintaining signal integrity and clarity is crucial. The JDI Duplex Mk4 features Radial’s renowned Jensen transformer technology, which provides exceptional audio fidelity and isolation.

This direct box is built to handle high-level signals and deliver accurate, transparent sound reproduction. Its robust construction ensures reliability in demanding live sound and studio environments. The JDI Duplex Mk4 is an excellent choice for connecting stereo instruments, keyboards, and other audio sources to a mixing console or recording system.

Features

• Jensen Transformers: Utilizes high-quality Jensen transformers for superior sound quality.
• Zero Phase Shift: Maintains accurate phase response for clear and coherent audio.
• Minimal Harmonic Distortion: Delivers clean, uncolored sound with virtually no distortion.
• Stereo Operation: Designed for connecting stereo signals with ease.
• Durable Construction: Built for reliability in live and studio environments.

Specifications

• Type: Passive stereo direct box
• Frequency Response: 20Hz to 20kHz (± 0.5dB)
• Impedance:
• Input: 140k Ohms
• Output: 600 Ohms
• Max Input Level: +20dB
• Phase Shift: Virtually zero
• Harmonic Distortion: Less than 0.05%
• Connector Type: 1/4" TRS input, XLR output
• Dimensions: 1.75" x 7.5" x 4.5" (4.45 x 19.05 x 11.43 cm)
• Weight: 1.4 lbs (0.64 kg)