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OWNER'S MANUAL
900W 5-Channel System Amplifier
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.
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Summary of Contents for NexD RD900/5
- Page 1 OWNER’S MANUAL 900W 5-Channel System Amplifier 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.
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Page 2: Planning Your Installation
Chassis Ground Connector including an identical one. (pg. 5) +12 V Power Remote Turn-On Connector Connector (pg. 5) (pg. 6) +12 VDC Ground Remote 2 | JL Audio - RD900/5 Owner’s Manual... - Page 3 Stupid Mistakes to Avoid • Check before drilling any holes in your vehicle Mounting the amplifier upside down is to make sure that you will not be drilling strongly discouraged. If mounting the amplifier through a gas tank, brake line, wiring harness or under a seat, make sure there is at least 1 inch other vital vehicle system.
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Page 4: Product Description
In some vehicles, it may deliver outstanding fidelity and efficiency. be necessary to upgrade the battery ground The RD900/5 can be operated with a wide wire. (See page 5 for important notice). variety of source units and system configurations. -
Page 5: Power Connections
(within 12 inches / 30 cm of voltage drops, these wires should be upgraded wire length). The fused output of the distribution block will connect to the RD900/5 with 4 AWG to 4 AWG when installing amplifier systems with main fuse ratings above 60A. -
Page 6: Turn-On Options
TURN-ON OPTIONS The RD900/5 can be switched on and off using These methods are useful when a conventional one of three methods, determined by the position +12V remote turn-on signal is not available in a of the amplifier’s “Turn-On Mode” switch. Please system. -
Page 7: Input Section
“4 Ch.” position and use the Ch 1 & 2 and adaptor (XD-CLRAIC2-SW). Ch 3 & 4 Inputs. In this mode, the RD900/5 will Line output converters are usually not needed derive its subwoofer channel signal from a sum with the RD900/5. -
Page 8: Input Type
(quieter for a given input voltage.) The active filter built into each channel To properly set the amplifier for maximum section of the RD900/5 can be used to eliminate clean output, please refer to Appendix A (page 14) potentially harmful and/or undesired frequencies in this manual. -
Page 9: Remote Level Control (Optional)
12dB per octave low-pass active filter for the screw. the subwoofer channel with fully variable Each pair of the RD900/5’s main channels are frequency selection between 50 Hz and 500 designed to deliver power into speaker loads equal Hz via the “LP Filter Freq. (Hz)” control to or greater than 2 ohms when using a “stereo”... -
Page 10: Subwoofer Outputs
SUB CH. Speaker Outputs Speaker Outputs Mono Subwoofer Output Information: If you wish to send a left-only or right-only signal to a pair of the RD900/5’s channels, set the “Input Type” switch for Remote CH. 1 CH. 2 CH. 3 CH. -
Page 11: Status Led / Protection Circuitry
The only condition that will shut down an operating status. Note: When the amplifier is undamaged RD900/5 completely is if battery powering up, the outputs are muted and the light voltage or remote turn-on voltage drops below strip will turn red for a 3 seconds. -
Page 12: System Configurations
In this configuration, “CHANNELS 1 & 2” of a system with a single RD900/5 are explained in detail. the RD900/5 will be bridged to drive the left front Once you have selected your desired component speakers (200W x 1 @ 4Ω) with high-pass filtering. - Page 13 SERVICING YOUR JL AUDIO AMPLIFIER If your amplifier fails or malfunctions, please return it to your authorized JL Audio dealer so that it may be sent in to JL Audio for service. There are no user serviceable parts or fuses inside the amplifier.
- Page 14 Play a track with an appropriate sine wave (within the frequency range to be amplified by each channel pair of the RD900/5) at 3/4 source unit volume. 6) Slowly increase the “Input Sensitivity” control until the “Clipping” LED is solidly lit, indicating maximum, unclipped output.
- Page 15 APPENDIX B: RD900/5 Specifications: Amplifier Section: Amplifier Topology: NexD™ Ultra-High Speed Class D Power Supply: Unregulated MOSFET switching type Rated Power (Main Channels / Stereo at 14.4V): 70W x 4 @ 4 ohms, 100W x 4 @ 2 ohms Rated Power (Main Channels / Bridged at 14.4V): 140W x 2 @ 8 ohms, 200W x 2 @ 4 ohms Rated Power (Subwoofer Channel at 14.4V):...
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Page 16: Appendix C: Troubleshooting
Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier. 16 | JL Audio - RD900/5 Owner’s Manual... - Page 17 “My amplifier shuts off once in a while, usually at higher volumes.” Check your voltage source and grounding point. The power supply of the RD900/5 will operate with charging system voltages down to 10V. Shutdown problems at higher volume levels can occur when the charging system voltage (or remote turn-on voltage) drops below 10V.
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Page 18: Installation Notes
INSTALLATION NOTES: Use this diagram to document your amplifier’s switch and control positions. 5 Channel System Amplifier Left CH. 1 CH. 3 Mono Right CH. 2 CH. 4 Only +12 VDC Ground Remote 18 | JL Audio - RD900/5 Owner’s Manual... - Page 19 Turn On Mode Input Type Input Sensitivity Input Type Input Sensitivity Input Sensitivity Stereo | Mono Stereo | Mono HP Filter Freq. (Hz) HP Filter Freq. (Hz) LP Filter Freq. (Hz) CHANNELS 1 & 2 CHANNELS 3 & 4 SUBWOOFER CHANNEL CH.
- Page 20 Miramar, FL 33025 (do not send product for repair to this address) International Warranties: Products purchased outside the United States of America are covered only by that country’s distributor and not by JL Audio, Inc. Printed in China RD900/5 MAN-053016...
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