Page 1: ...DE Radial Engineering Ltd 1588 Kebet Way Port Coquitlam BC V3C 5M5 tel 604 942 1001 fax 604 942 1010 email info radialeng com www radialeng com JPC www radialeng com STEREO PC DI BOX ISOLATED IN ACTIVE OUT MK3 ...
Page 2: ......
Page 3: ...onnecting the JPC 4 JPC features 7 Frequently asked questions 8 Block diagram and specifications 11 Warranty Back cover Radial Engineering Ltd 1588 Kebet Way Port Coquitlam BC V3C 5M5 tel 604 942 1001 fax 604 942 1010 email info radialeng com web www radialeng com Features and specifications are subject to change without notice ...
Page 4: ...JPC certainly fits the bill A choice of 3 5mm and RCA input thru put connectors make interfacing a snap with all types of equipment A single switch inserts a 15dB pad into both channels two power LEDs one for each channel 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 the most abusive envi...
Page 5: ...gn creates a protective zone around buttons and connectors Tough baked enamel finish for years of great looking performance INPUT PANEL 1 15dB Pad is used to prevent loud sources from overloading the JPCs audio circuit 2 48V Power LEDs let you know that phantom has been turned on and is powering the two channels 3 Dual 1 4 jacks can be use for a stereo device or two mono signals 4 3 5mm TRS stereo...
Page 6: ...es for a maintenance free long life 15 Welded I beam construction makes it impossible to torque the PC board 10 Isolated XLR connectors to eliminate chassis ground potential 11 Active drive circuit electronically balances stereo signals for long cable runs without loss 12 Transformers on both inputs provide 100 isolation to eliminate hum and noise from ground loops 10 11 12 13 14 15 ...
Page 7: ...th the 3 5mm and RCAinputs The JPC can even interface electronic musical instruments like keyboards and drum machines with 1 4 cables Or in a pinch the JPC can be used as a standard instrument DI Finally the JPC s thru put feature gives you the option to split the signal and adapt from one connector type to another The Inputs and thru puts The JPC is outfitted with a wide array of connectors to ma...
Page 8: ...o cassette recorders etc RCA thru puts A duplicate of the input signal is available at the RCA thru put connectors This feature can come in handy to split the signal to a second mixer or tape recorder Un used connectors as thru puts All of the JPC s input connectors are parallelled together This means that any unused inputs can also be a thru put to split the stereo signal and or adapt one format ...
Page 9: ...th instruments that feature active electronics such as acoustic guitars that have a built in pick up and pre amplifier bass guitars with active pickups and electonic keyboards We do not however recommend using the JPC with instruments that have passive pickups like a standard bass guitar or contact pezio pickups The JPCs input transformers will introduce impedance loading when used with passive pi...
Page 10: ...d path and differing voltage potentials interacting together The JPC eliminates this problem by providing 100 transformer isolation on both inputs Using the ground lift To ensure the widest possible compatibility with a variety of audio devices a ground lift switch is provided on the JPC The default position is lifted pushed in as the JPC s transformers are designed to isolate the input ground fro...
Page 11: ...ise and due to their lower impedance can travel much further Balanced signals are the norm in professional recording broadcast and live sound By properly matching the impedance you will enjoy better sound less noise and an extended frequency response What kinds of audio devices will the JPC work with Virtually any electronic audio device that outputs an unbalanced hi z signal See the chart below f...
Page 12: ... the impedance mismatch Will it then harm the JPC if I connect a bass to it No of course not We only state this advisory as we make DIs for instruments such as the J48 and JDI that are simply better for instruments The JPC will certainly work in a pinch Can I use the JPC on keyboards Yes Just make sure you do not overload the JPC by driving too much signal through it The JPC s smaller transformers...
Page 13: ... will supply lower voltages which could starve the JPC s circuit I am hearing buzz hum Check the ground lift switch on the side of the JPC Select the lifted position for the JPC to isolate the input ground from the output This will eliminate buzz hum caused by voltage potential between the input source device and the main console at the other end of the XLR outputs Can the JPC be rack mounted Yes ...
Page 14: ... Linear performance 2dB from 20Hz to 20kHz Total harmonic distortion 0 06 20Hz 0 005 1kHz Phase distortion 0 02º at 1kHz Maximum input voltage 3 12 Volts RMS 9V peak Output level 30dBu w o pad 0dBu ref 1V RMS input 45dBu w pad 0dBu ref 1V RMS input Input connections 1 4 TS 3 5mm TRS stereo RCA x 2 Output connections XLR balanced AES pin 2 HOT Size 3 5 wide 2 high 5 5 deep Weight 1kg or 2lbs Constr...
Page 15: ......
Page 16: ...dealer name must accompany any request for work to be performed under this limited warranty This limited warranty shall not apply if the product has been damaged due to abuse misuse misapplication accident or as a result of service or modification by any other than an authorized Radial repair center THERE ARE NO EXPRESSED WARRANTIES OTHER THAN THOSE ON THE FACE HEREOF AND DESCRIBED ABOVE NO WARRAN...
