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A1800
monoblock subwoofer amplifier
OWNER’S MANUAL
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 and extended warranty
coverage, 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 equi
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PROTECT YOUR HEARING! INSTALLATION APPLICATIONS PLANNING YOUR INSTALLATION We value you as a long-term customer. For This amplifier is designed for operation in It is important that you take the time to read Mounting the amplifier upside down is that reason, we urge you to practice restraint in vehicles with 12 volt, negative-ground electrical this manual and that you plan out your strongly discouraged. the operation of this product so as not to damage systems. Use of this product in vehicles w
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PRODUCT DESCRIPTION POWER CONNECTIONS The JL Audio A1800 is a monoblock subwoofer 5) Ru n speaker cables from the speaker systems Before installing the amplifier, disconnect the The ground connection should be made using amplifier utilizing proprietary and patented to the amplifier mounting location. negative (ground) wire from the vehicle’s battery. the same gauge wire as the power connection (4 Class D technology. Its frequency response 6) Find a good, solid metal grounding point This wil
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TURN-ON LEAD AMPLIFIER CONTROLS The A1800 uses a conventional +12V remote You may run a stereo or a mono signal into 1) “Input Sens.”: Once the appropriate “Input Filter Controls turn-on lead, typically controlled by the source the inputs of the amplifier. The amplifier’s input Voltage” range has been selected, the control Most speakers are not designed to reproduce unit's remote turn-on output. The amplifier will section automatically sums stereo signals to mono labeled “Input Sens.” located
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BASS BOOST CONTROLS Tuning Hint: A trunk mounted sub whose The preamp output signal is not affected by the Speaker loads below 2 ohms nominal are not output has to “fight” through a rear deck or a “Bass Boost” processing selected for the amplifier recommended and may cause the amplifier back seat often benefits from the 12 dB/octave or by any crossover filter selected (if the input to initiate a protection mode which reduces slope which lets more upper bass content pass signal is full-range, t
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AMPLIFIER STATUS INDICATOR LIGHTS & SERVICING YOUR JL AUDIO AMPLIFIER PROTECTION CIRCUITRY Low-Voltage protection: If your amplifier fails or malfunctions, please There are two status indicator lights on the If the car’s supply voltage drops below 10 return it to your authorized JL Audio dealer so input / control end of the amplifier. volts, the entire amplifier will shut itself off to that it may be sent in to JL Audio for service. protect its internal circuitry. The green “Power” There are
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APPENDIX A: APPENDIX B: APPENDIX C: Input Sensitivity Level Setting 8) Increase the “Input Sens.” control until the Precise Frequency Selection Chart A1800 Specifications Following the directions below will allow the target voltage is observed with the voltmeter. “FILTER FREQ” AMP FILTER installer to adjust the input sensitivity of each 9) Once you have adjusted the A1800 to its General Specifications: Detent Panel Actual amplifier channel pair simply and easily in just a maximum low-distorti
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APPENDIX D: TROUBLE SHOOTING “How do I properly set the input sensitivity on my amplifier” “My amplifier shuts off once in a while, usually at higher volumes” Please refer to Appendix A (page 12) to set the input sensitivity for Check you r voltage source and grounding point. The power supply maximum, low-distortion output. of the A1800 will operate with charging system voltages “My amplifier doesn’t turn on” down to 10V. Shutdown problems at higher volume levels Check t he fuse, not jus
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INSTALLATION NOTES: Use this diagram to document your amplifier’s switch and control positions. CH 1 (Left) Pre-Outs Bass Boost Controls Filter Freq. (Hz) 65 Input Voltage Bass Boost Input Sens. LP Filter 55 80 45 100 Power Protect Low | High 40 200 Remote Bass Port CH 2 (Right) 16 JL AUDIO A1800 JL AUDIO A1800 17
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INSTALLATION NOTES: INSTALLATION NOTES: 18 JL AUDIO A1800 JL AUDIO A1800 19
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LIMITED WARRANTY - AMPLIFIERS (USA) JL AUDIO warrants this product to be free of defects in materials and workmanship for a period of ninety (90) days from the original date of purchase. The warranty term is extended to two (2) years if installation is performed or approved by an authorized JL AUDIO dealer (proof of installation or approval required on purchase receipt). This warranty is not transferrable and applies only to the original purchaser from an authorized JL AUDIO dealer. Should s
