JL Audio 98621 - User Manual
JL Audio 98621 Car Amplifier – User Manual, read for free online in PDF format. We hope this helps you resolve any issues you may have. If you have further questions, please contact us through the contact form.
Table of Contents:
- Page 4 – PRODUCT DESCRIPTION; The RD400/4 can be operated with a wide; TYPICAL INSTALLATION SEQUENCE; The following represents the sequence
- Page 5 – POWER CONNECTIONS; FUSE REQUIREMENTS
- Page 6 – The RD400/4 can be switched on and off using; If a source unit does not have a dedicated; These methods are useful when a conventional; DC Offset-Sensing: The amplifier will turn on
- Page 7 – INPUT SECTION; INPUT VOLTAGE RANGE
- Page 8 – FILTER CONTROLS; Most speakers are not designed to reproduce
- Page 9 – Tuning Hint: If you are using the RD400/4; PREOUTS; The RD400/4’s speaker outputs are designed
- Page 10 – BRIDGING CONSIDERATIONS; Bridging is the practice of combining the; STATUS LED / PROTECTION CIRCUITRY; There is a bi-color LED light strip on the top; functioning normally, audio output is active.
- Page 12 – Crossover Setup for Bi-Amplified System; MULTI-AMPLIFIER SYSTEMS; Here are three possible configuration options:
- Page 13 – right and dedicated subwoofer outputs.; SERVICING YOUR JL AUDIO AMPLIFIER; If your amplifier fails or malfunctions, please
- Page 14 – Follow the steps below to adjust the input; Necessary Equipment; • CD with a sine-wave test tone recorded at; The Seven-Step Procedure; amplifier’s speaker output connectors.; It will be necessary to re-adjust the “Input
- Page 15 – Rated Power at 14.4V with less than; Signal to Noise Ratio:
- Page 16 – driving a load equal to or greater than 2 ohms.; “My amplifier’s output fluctuates when I tap on it or hit a bump.”; contact with the input jacks on the amplifier.; APPENDIX C: TROUBLESHOOTING
- Page 20 – If you need service on your JL AUDIO product:; (do not send product for repair to this address); International Warranties:; by that country’s distributor and not by JL Audio, Inc.
Thank you for purchasing a JL Audio amplifier for
your automotive sound system.
Your amplifier has been designed and manufactured to exacting
standards in order to ensure years of musical enjoyment in your vehicle.
For maximum performance, we highly recommend that you have
your new amplifier installed by an authorized JL Audio dealer. Your
authorized dealer has the training, expertise and installation equipment
to ensure optimum performance from this product. Should you
decide to install the amplifier yourself, please take the time
to read this manual thoroughly to familiarize yourself
with its installation requirements and setup procedures.
If you have any questions regarding the instructions in this
manual or any aspect of your amplifier’s operation, please contact your
authorized JL Audio dealer for assistance. If you need further assistance,
please call the JL Audio Technical Support Department
at (954) 443–1100 during business hours.
OWNER’S MANUAL
400W 4-Channel Amplifier
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Summary
4 | JL Audio - RD400/4 Owner’s Manual PRODUCT DESCRIPTION The JL Audio RD400/4 is a four-channel, full- range audio amplifier utilizing JL Audio NexD™ ultra-high speed switching technology to deliver outstanding fidelity and efficiency. The RD400/4 can be operated with a wide variety of source units...
5 POWER CONNECTIONS Before installing the amplifier, disconnect the negative (ground) wire from the vehicle’s battery. This will prevent accidental damage to the system, the vehicle and your body during installation. INPUT SEC TION (L) (R) Left or Mono Right Only CH. 1&2 CH. 3&4 CH. 3 (L) CH...
6 | JL Audio - RD400/4 Owner’s Manual TURN-ON OPTIONS The RD400/4 can be switched on and off using one of three methods, determined by the position of the amplifier’s “Turn-On Mode” switch. Please read these options and decide which is best suited for your specific system. 1) +12V remote turn-on lea...
