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User Guide
Stereo -10dB Unbalanced to +4dB
Balanced Converter and Line Driver
Radial Engineering Ltd.
1845 Kingsway Ave., Port Coquitlam, BC V3C 1S9, Canada
Tel: 604-942-1001 • Fax: 604-942-1010
email: info@radialeng.com
Radial J+4 user guide - Part #: R870 1235 00 / 08-2021
Subject to change without notice, all rights reserved
®
J+4
™
True to the Music
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Summary of Contents for Radial Engineering J+4
- Page 1 Balanced Converter and Line Driver Radial Engineering Ltd. 1845 Kingsway Ave., Port Coquitlam, BC V3C 1S9, Canada Tel: 604-942-1001 • Fax: 604-942-1010 email: info@radialeng.com Radial J+4 user guide - Part #: R870 1235 00 / 08-2021 Subject to change without notice, all rights reserved...
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Page 2: Block Diagram
Although the J+4 is ‘plug and play’ easy to use, we suggest you read through it and familiarize yourself with the features to get the most out of your J+4. Should you have any questions, comments or concerns not covered in these pages, please visit our web site and the J+4 FAQ section. - Page 3 15. Two custom designed Radial iso- lation transformers eliminates noise caused by ground loops. 16. 14-gauge inner I-beam frame protects the PCB from torque and prevents solder joint failure. Radial Engineering Ltd. User Guide ™...
- Page 4 Connect the desired source device (ie: a CD player, smartphone, computer sound card, DJ mixer) to the stereo input jacks on the J+4 using a ¼" phone, RCA or 3.5mm stereo cable. Since this part of the signal chain is unbalanced it is a good idea to keep these cables under 8 meters (25 feet) to reduce the chance of inducted noise.
- Page 5 APPLICATION 1: Signal level and impedance conversion The J+4 is used to match the output from an MP3 player to the input of a pro audio system. To get the best sound, the unbalanced -10dB signal is converted up in level to balanced +4dB.
- Page 6 1.55 lb (720g) RADIAL ENGINEERING 3 YEAR TRANSFERABLE LIMITED WARRANTY RADIAL ENGINEERING LTD. (“Radial”) warrants this product to be free from defects in mate- rial and workmanship and will remedy any such defects free of charge according to the terms of this warranty.