Radial JPC

Computer Active Direct Box


Radial JPC

The Radial JPC is an analog stereo interface designed to help solve the hum and buzz problems commonly associated with connecting a computer or consumer playback device to an audio system.

  • Easy-to-use stereo interface for laptop computers
  • Active signal path with transformer isolation
  • Eliminates hum and buzz common to PCs
  • Multiple connector types for any audio source

Hybrid circuit for low noise

The JPC is a stereo direct box that is easy to use with practically any consumer electronic device. It utilizes active buffers and transformer isolation to create a hybrid circuit that blocks ground loops and reduces system noise, along with AC-blocking capacitors to prevent any audio system noise from bleeding back into the computer. The choice of ¼”, RCA, and 3.5mm input connectors make it easy to interface with all types of unbalanced audio sources such as computers, smartphones, and tablets, and the outputs are XLR balanced mic level to feed snake systems and PAs. Powering the JPC is accomplished via a 48V phantom from a mixing console, allowing the JPC to be used in concert environments without requiring an external power supply.

The JPC is a stereo consumer-to-mic level interface that offers a myriad of input connector options to simplify interfacing your computer, DVD/CD, MP3 player, or other consumer audio device with the world of balanced professional audio equipment. As with all Radial products, tremendous attention has been paid to quality construction and delivering exceptional audio performance while eliminating noise.

Audio circuit type: Unity Gain buffers and inverters using low noise high-end audio grade operational amplifiers
Number of channels: 2
Frequency response: 20Hz ~ 20kHz +/- 2dB
Dynamic range: 111dB
Total harmonic distortion: 0.01% @ -15dBu Output
Intermodulation Distortion: Less than 0.15% at any level below clipping
Phase Deviation: +29º at 20Hz | -5º at 1kHz | -80º at 20kHz
Input Impedance: 10kΩ
Output Impedance: 600Ω
Equivalent Input Noise: -94dBu
Noise: -97dB below 0dB Out
Maximum Input: +17dBu
Input pad, Ground lift, Phantom Power
Input Connectors: 1/4″, RCA, 3.5mm TRS
Output Connectors: XLR
Construction: 14 gauge steel chassis and outer shell
Size (L x W x D): 3.3″ x 5.0″ x 2″ (84 x 127 x 48mm)
Weight: 1.55lb (720 g)
Power: 48V Phantom Power (each channel requirers 48V phantom)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable


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