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Radial JPC Stereo PC-AV Direct Box


Radial JPC Stereo PC-AV Direct Box

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UPC: nan SKU: RAD-JPC Category: Brand:


No one builds a stereo direct box like The Radial JPC. This Stereo PC-AV Direct Box has been specifically designed for use with sound cards and other consumer electronic products to allow these to be connected to a professional sound system. Its unique design combines the advantages of transformer-isolated inputs with an active drive circuit, giving you the `best of both worlds’ in a compact and extremely flexible and road worthy package.

The Radial JPC was designed to help solve the buzz and hum problems commonly associated with connecting a computer to an audio system. This is accomplished by combining active buffers and transformer isolation to create an effective ‘hybrid’ circuit.

Intended for professional field use, the JPC comes fully loaded with choice of ¬”, RCA and 3.5mm input connectors that make it easy to interface with all types of unbalanced audio sources such as computers, iPods, and CD players. It is equipped with isolation transformers to eliminate hum and buzz caused by ground loops and to further reduce system noise; while AC blocking capacitors in the active circuit prevent pollution from the audio system from bleeding back into the computer. Outputs are XLR balanced mic level for easy interface to snake systems and PAs. Powering the JPC is accomplished via 48V phantom from a mixing console. This enables the JPC to be used in concert environments without requiring an external power supply.

The JPC is a great sounding stereo direct box that is plug-and-play easy to use with practically any consumer electronic device. The noise eliminating advantages makes the JPC a must-have problem solver for any technician’s audio kit.

The Radial JPC… an effective tool designed to make interfacing gear easy.

Transformer coupled inputs uniquely isolate the `source’ from the `destination’. This proven approach eliminates 60-cycle hum and buzz caused by so called ground loops when two pieces of electrically powered equipment interface. Because the active circuit does all of the impedance conversion and balancing, a dedicated 1:1 transformer can be used. The result is a hybrid design that is great sounding, compact and affordable.

As with all great designs, simplicity is a fundamental trait and the Radial JPC certainly fits the bill. A multitude of stereo 1/4″, 1/8″ and RCA input AND thru-put connectors makes interfacing easy with all types of gear. A single switch inserts a -10dB pad, two power LEDs confirm 48V phantom is turned on, and a pair of XLR output connectors round out the feature set.

Naturally similar to alll Radial products, the JPC is built to withstand the harshest environments. The book-cover wrap-around sleeve design protects switches and connectors from damage, while the 14 gauge steel I-beam construction eliminates stress that could torque the PC board and cause electrical failure. A full-bottom no-slip pad provides electrical insulation and mechanical isolation with plenty of `stay-put’ for use on hectic stages. With a baked enamel finish, the Radial JPC will look great for years on the road!


  • Stereo DI for computer sound cards & A/V
  • Transformer isolation eliminates ground loops
  • Converts -10db to balanced XLR mic level
  • Active drive circuit for long cable runs
  • Compact design – may be J-Rak mounted
  • 48V phantom power eliminates batteries
  • Ultra rugged 14-gauge steel construction


  • Audio circuit type: Unity Gain buffers and inverters using low noise high end audio grade operational amplifiers
  • Frequency response: 20Hz ~ 20kHz +/- 2dB
  • Signal to noise ratio:
  • Dynamic range: 111dB
  • Noise floor: -97dB below 0dB Out
  • Equivalent input noise: -94dBu
  • Maximum input: +17dBu
  • Phase deviation: +29° at 20Hz | -5° at 1kHz | -80° at 20kHz
  • Total harmonic distortion: 0.01% @ -15dBu Output
  • Inter-modulation distortion: Less than 0.15% at any level below clipping
  • Input impedance: 10kΩ
  • Output impedance: 600Ω
  • Input pad: -15dB
  • 48V power LED Two 48V phantom indicators, one for each channel
  • Ground lift: Disconnects pin-1 at the XLR outputs
  • XLR configuration: AES standard (pin-2 hot)
  • Power: 48V Phantom Power (each channel requirers 48V phantom)
  • Construction: 14 gauge steel chassis and outer shell
  • Finish: Durable powder coat
  • Size: 3.3″ x 5.0″ x 2″ (84 x 127 x 48mm)
  • Weight: 1.55lb (720 g)
  • Conditions: For use in dry locations only between 5°C and 40°C
  • Warranty: Radial 3-year, transferable

Additional information

Weight 1 lbs


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