Product Description
The Radial JPC is a stereo direct box that has been specifically designed for use with computer sound cards and other consumer electronic products to allow these to be connected to a professional sound system. It is unique in that it 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 package.
Transformer coupled inputs have the unique advantage of isolating 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 devices are connected together. Because the active circuit does all of the impedance conversion and balancing, a dedicated 1:1 transformer can be used. This results in a hybrid design that is at once great sounding, compact and more affordable.
As with all great designs, simplicity is a fundamental trait and the Radial JPC certainly fits the bill. A choice of stereo ¼”, 1/8” and RCA input AND thru-put connectors make interfacing a snap with all types of equipment. 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.
Of course like all Radial products, the JPC is built to handle any environment. 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 solder joint failure. A full-bottom no-slip pad provides electrical insulation and mechanical isolation with plenty of ‘stay-put’ for use on hectic stages. And with its baked enamel finish, the Radial JPC will continue looking great for years!
- 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
Transformer coupled inputs have the unique advantage of isolating 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 devices are connected together. Because the active circuit does all of the impedance conversion and balancing, a dedicated 1:1 transformer can be used. This results in a hybrid design that is at once great sounding, compact and more affordable.
As with all great designs, simplicity is a fundamental trait and the Radial JPC certainly fits the bill. A choice of stereo ¼”, 1/8” and RCA input AND thru-put connectors make interfacing a snap with all types of equipment. 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.
Of course like all Radial products, the JPC is built to handle any environment. 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 solder joint failure. A full-bottom no-slip pad provides electrical insulation and mechanical isolation with plenty of ‘stay-put’ for use on hectic stages. And with its baked enamel finish, the Radial JPC will continue looking great for years!
| Frequency range | 40Hz to 20kHz , (+/- 3dB) |
| Circuit type | Active with isolated inputs |
| Powering | 48-Volt phantom powered, 5mA draw |
| Input connections | 1/4” TRS, 1/8” TRS, twin RCA, with switched -10dB pad |
| Output connections | XLR balanced, AES standard pin configuration |
| Dynamic range | 80dB |
| Distortion | 0.5% at 1kHz with -10dB input |
| Intermodulation distortion | Less than 1% |
| Phase distortion | Less than 5º at 100Hz, 0.1º at 1kHz |
| Linear response | +/- 1dB from 50Hz to 15kHz +/- 3dB from 20Hz to 20kHz |
| Construction | 14-gauge steel chassis & shell, baked enamel finish |
| Size | 3-5/16" x 5” x 1-7/8" (84mm x 127mm x 48mm) |
| Weight | 2.6lb (1.8kg) |
| Warranty | 3 years, limited (see owner’s manual for details) |
There are no demos at this time.
You may also be interested in the following product(s)
Add to Cart
Instrument Cable 10ftRegular Price: $12.00 Special Price: $7.99 |
Customer Reviews













