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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 The JL Audio G4500 is a four-channel, (90 cm) from the amplifier to the ground The G4500’s “+12VDC” and “Ground” Many vehicles employ small (10 AWG - full-range audio amplifier utilizing patented connection point. In some vehicles, it may be connections are designed to accept 4 AWG power 6 AWG) wire to ground the battery to the Absolute Symmetry™ Class A/B technology necessary to upgrade the battery ground wire. wire. 4 AWG is a minimum power wire size for vehicle ch
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inPut s eCtion The G4500’s input section allows you to send To use speaker-level sources, splice the speaker Do not increase any “Input Sens.” setting for 1) “Filter Mode” Control: The G4500 employs a signals to the amplifier section through the use of output wires of the source unit or small amplifier any channel(s) of any amplifier in the system 12dB per octave filter for each pair of channels either two or four differential-balanced inputs. onto a pair of RCA plugs for each input pair. be
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bass boost Controls sPeaker outP uts 2) “Sum”: When the G4500 is being used to drive The G4500’s speaker outputs are designed to When a pair of channels are bridged, they front and rear speaker systems, this preamp accept 16 AWG - 8 AWG wire. will deliver 250W x 1 into a 4 ohm load or output mode will deliver a summed front/rear Each pair of the G4500’s channels are 160W x 1 into an 8 ohm load. Operating a stereo signal to a subwoofer amplifier, while designed to deliver power into spe
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am Pli Fier status indiC ator l ig Hts & sYstem ConF igurations Prote Ction CirC uitr Y l ow-Voltage protection: The G4500 is a flexible amplifier, well-suited B ) Fade Subwoofer Level vs. HF Level There are two status indicator lights on the If the car’s supply voltage drops below 10 for a multitude of system configurations. In R e q u i r e d : a source unit or processor with two input / control end of the amplifier. volts, the entire amplifier will shut itself off to this section, the mos
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Next, turn your attention to the “Channel 1 & B) Fade Subwoofer Level vs. HF Level: D) Front to Rear HF Fading and Subwoofer Set the subwoofer amplifier’s “Input Sens.” 2 Controls” and select “HP” (high-pass) on the R e q u i r e d : a source unit or processor with front Level Control: with the source unit’s subwoofer level control “Filter Mode” switch and an appropriate “Filter and rear pairs of stereo outputs. R e q u i r e d : a source unit or processor with set at 3/4 of full output. Fre
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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 g4500 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 G4500 to its g eneral s pecifications: detent Panel a ctual amplifier channel pair simply and easily in just a maximum l
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aPP endix d: troubles Hooting “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 14) to set the input sensitivity for Check your voltage source and grounding point. The power supply maximum, low-distortion output. of the G4500 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 ju
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installation notes : Use this diagram to document your amplifier’s switch and control positions. 18 JL AUDIO G4500 JL AUDIO G4500 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
