1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 RADIAL JPC™ STEREO PC-AV DIRECT BOX

Part Number: 000112

RADIAL JPC™ STEREO PC-AV DIRECT BOX - Part Number 000112
RADIAL JPC™ STEREO PC-AV DIRECT BOX DI • 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 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! JPC Features & Specifications The JPC 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 AES standard professional ballanced equipment. As with all Radial products, only the highest professional standards are used inside and out, in circuitry and construction. Inside the JPC 1. Isolated XLR connectors to eliminate chassis ground potential. 2. Active balanced circuit drives long cable runs without signal loss. 3. Audio Transformers on both inputs provide 100% isolation to eliminate hum and noise causing ground loops. 4. 14-Gauge steel welded I-beam construction makes it impossible to torque the PC board. 5. High grade switches - long life, high cycle for reliable performance. 6. Military spec PC board with full surface ground plane to reduce RF noise susceptibility. Input and Output Panels 7. –10dB pad reduces the level going into the JPC from loud sources that could overload the circuit and cause distortion. 8. 48V Power on LEDs lets you know that phantom has been turned on and is powering the two channels. 9. 1/4” connectors for each channel in parallel with RCA and 1/8" connectors 10. 1/8” TRS (stereo) connector designed for PCs and laptops, makes connection easy with standard 1/8” to 1/8” cable. 11. Twin RCA connectors are great for connecting DVD/CD players and video machines. RCA thru-puts for flexibility. 12. Book-end design creates a protective zone around the switches & connectors – Indestructable 14-gauge steel construction. 13 Ground Lift switch - recessed to prevent accidental operation. Disconnects the ground path to the transformer at the XLR output. This is used when a ground path is made at the input side such as with a computer or rack module. 14. Full no-slip rubber bottom pad provides mechanical isolation, electrical insulation and ‘stay-put-ability!’ 15. Twin balanced XLR male output connectors; AES standard with Pin-1 ground and Pin-2 hot. Construction The JPC is designed to withstand the rigors of high-use professional environments! Radial's innovative book-end design provides a protective zone around the switches and connectors that makes it practically impossible to damage these components. Stress on circuit boards causes broken and intermittant solder joints and is a common cause of failure in lesser DI's. Radial's 14-gauge welded I-beam inner chassis and 14-guage outer shell greatly reduce the possibility of torque stress being applied to the PC board. A full-bottom no-slip rubber pad works double duty by (a) providing protection from electrical shock from (eg:) guitar amp handles which are often directly coupled to the amp chassis, and (b) assuring that the J48 won’t slip and slide around. JPC SPECIFICATIONS 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 Input level (max): Output level: 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)
Stereo DI for computer sound cards & A/V ! 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985

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