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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, 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
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Prote Ct Your Hearing! installation aPP liC ations 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 vehi
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Produ Ct d esCri Ption Power Conne Ctions The JL Audio G-MAX is a monoblock 5) Run speaker cables from the speaker systems Before installing the amplifier, disconnect the The ground connection should be made using subwoofer amplifier utilizing proprietary and to the amplifier mounting location. negative (ground) wire from the vehicle’s battery. the same gauge wire as the power connection (4 patented Class D technology. Its frequency 6) Find a good, solid metal grounding point This will pre
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t urn- o n l ead amPliFier Controls The G-MAX 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.” loca
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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
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am Pli Fier status indiC ator l ig Hts & s er ViCing Your J l audio a mPliF ier Prote Ction CirC uitr Y l ow-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 “P
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aPPendix a : aPP endix b: aPPendix C: input s ensitivity l evel s etting 8) Increase the “Input Sens.” control until the Precise Frequency selection Chart g -max s pecifications 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) O nce you have adjusted the G-MAX to g eneral s pecifications: detent Panel a ctual amplifier channel pair simply and easily in just a its maximum
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aPPendix d: troublesHooting “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 y our voltage source and grounding point. The power supply maximum, low-distortion output. of the G-MAX will operate with charging system voltages “my amplifier doesn’t turn on” down to 10V. Shutdown problems at higher volume levels Check the fuse, not just
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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 PowerProtect Low | High 40 200 Remote Bass Port CH 2 (Right) 16 JL AUDIO G-MAX JL AUDIO G-MAX 17
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installation notes : installation notes : 18 JL AUDIO G-MAX JL AUDIO G-MAX 19
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l imited w arrant Y - a mPli Fiers ( usa ) JL AUDIO warrants this product to be free of defects in materials and workmanship for a period of two (2) years. This warranty is not transferrable and applies only to the original purchaser from an authorized JL AUDIO dealer. Should service be necessary under this warranty for any reason due to manufacturing defect or malfunction, JL AUDIO will (at its discretion), repair or replace the defective product with new or remanufactured product at no c
