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JL AUDIO 300/2
two-channel full-range 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 installa
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PROTECT YOUR HEARING! INSTALLATION APPLICATIONS PLANNING YOUR INST ALLA TION We value you as a long-term customer. For that This amplifier is designed for operation in vehicles It is important that you take the time to read If mounting the amplifier under a seat, make sure reason, we urge you to practice restraint in the with 12V, negative-ground electrical systems. Use of this manual and that you plan out your installation there is at least 1 inch (2.5 cm) of space above the operation of this p
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PRODUCT DESCRIPTION POWER CONNECTIONS The JL Audio 300/2 is a two-channel full-range 6) Find a good, solid metal grounding point Before installing the amplifier, disconnect the The ground connection should be made using amplifier utilizing patented Absolute Symmetry™ close to the amplifier and connect the negative negative (ground) wire from the vehicle's battery. the same gauge wire as the power connection Class AB technology for both channels.These power wire to it using appropriate hardware.
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FUSE REQUIREMENTS TURN-ON LEAD INPUT SECTION It is absolutely vital that the main power wire(s) The 300/2 uses a conventional +12V remote The 300/2 has one input section, which contains a 2) Input Sensitivity Adjustment: Located next to to the amplifier(s) in the system be fused within turn-on lead, typically controlled by the source unit's pair of RCA-type input jacks, an “Input Voltage” the “Input Voltage” switch in the “Amplifier Input 18 inches (45 cm) of the positive battery post remote tur
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CROSSOVER CONTROLS PREAMP OUTPUT SECTION SPEAKER OUTPUTS Crossovers are groups of individual electronic filters 2) “Filter Slope” Control: This switch allows The 300/2 incorporates a flexible preamp output The 300/2 employs JL AUDIO's exclusive which allow only certain frequency ranges to pass you to select from two filter slopes for that section, so that additional amplifiers can be added to Regulated, Intelligent Power Supply (R.I.P.S.) design. through them by attenuating frequencies outside c
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BRIDGING CONSIDERATIONS STATUS INDICATOR LIGHTS / SERVICING YOUR JL AUDIO AMPLIFIER Bridging is the practice of combining the output PROTECTION CIRCUITRY If your amplifier fails or malfunctions, please of two amplifier channels to drive a single load. There are three status indicator lights on the top return it to your authorized JL Audio dealer so When bridged, each channel produces signals of of the amplifier. These are as follows: that it may be sent in to JL Audio for service. equal magnitud
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APPENDIX A: APPENDIX B: Precise Frequency Selection Chart Input Sensitivity Level Setting “FILTER FREQ” AMP FILTER JL Audio amplifiers utilizing the Regulated 6)Verify that you have disconnected the Detent Panel Actual Intelligent Power Supply (R.I.P.S.) allow delivery of speakers before proceeding. Play a track with an Number Marking Freq. their rated power when connected to any load appropriate sine wave (within the frequency range Full counter-clockwise: 58 impedance from 1.5 - 4 per channel
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APPENDIX C: TROUBLE SHOOTING “MY AMPLIFIER DOESN’T TURN ON” “MY AMPLIFIER TURNS ON, BUT THERE IS NO OUTPUT” Check to make sure there is +12V at the “Remote” connection of Check the input signal using an AC voltmeter to measure the the amplifier. In some cases, the turn-on lead from the source voltage from the source unit while an appropriate test tone unit is insufficient to turn on multiple devices and the use of a is played through the source unit (disconnect the RCA relay is required. To test
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APPENDIX D: 300/2 Specifications GENERAL SPECIFICATIONS: Recommended Fuse Value: 40A Recommended Fuse Type: AGU or MaxiFuse™ INPUT SECTIONS: No. of Inputs: One Stereo Pair Input Type: Differential-balanced with RCA jack inputs Input Range: Switchable from 200mV - 2V RMS to 800mV - 8V RMS AMPLIFIER SECTION: Amplifier Topology: Class AB with patented Absolute Symmetry™ dual N-Channel MOSFET output design Power Supply: Independent, pulse width modulation- regulated switching power supply with mult
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INSTALLATION NOTES: Use this diagram to document your amplifier’s switch and control positions. 18 JL AUDIO 300/2 JL AUDIO 300/2 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 servic
