APPENDIX D: TROUBLE SHOOTING

“MY AMPLIFIER DOESN’T TURN ON”

Check to make sure there is +12V at the “Remote” connection of the amplifier. In some cases, the turn-on lead from the source unit is insufficient to turn on multiple devices and the use of a relay is required. To test for this problem, jump the “+12V” wire to the “Remote” terminal to see if the amplifier turns on. If this does not work, proceed to the next step.

Check the fuse, not just visually, but with a continuity meter. It is possible for a fuse to have poor internal connections that cannot be found by visual inspection. It is best to take the fuse out of the holder for testing. If no problem is found with the fuse, inspect the fuse-holder.

“I GET A DISTORTED / ATTENUATED SOUND COMING OUT OF THE SPEAKER(S)”

Check the input signal and input signal cables to make sure signal is present at the “Amplifier Inputs” and the cables are not pinched or loose. It may be helpful to try a different set of cables and/or a different signal source to be sure.

“MY AMPLIFIER SHUTS OFF ONCE IN A WHILE, USUALLY AT HIGHER VOLUMES”

Check your voltage source and grounding point.The power supply of the e1200 will operate with charging system voltages down to 8V. Shutdown problems at higher volume levels can occur when the charging system voltage drops below 8V.These dips can be of very short duration making them extremely difficult to detect with a common DC voltmeter.To ensure proper voltage, inspect all wiring and termination points. It may also be necessary to upgrade the ground wire connecting the battery to the vehicle’s chassis and the power wire connecting the alternator to the battery. Many vehicles employ small

(10 AWG - 6 AWG) wire to ground the battery to the vehicle’s chassis and to connect the alternator to the battery.To prevent voltage drops, these wires should be upgraded to 4 AWG when installing amplifier systems with main fuse ratings above 60A. Grounding problems are the leading cause of mis-diagnosed amplifier failures.

“MY AMPLIFIER TURNS ON, BUT THERE IS NO OUTPUT”

Check the input signal using an AC voltmeter to measure the voltage from the source unit while an appropriate test tone is played through the source unit (disconnect the input cables from the amplifier prior to this test).The frequency used should be in the range that is to be amplified by the amplifier

(example: 50 Hz for a sub bass application or 1 kHz for a full range / high-pass application). A steady, sufficient voltage (between 0.2 and 8.0V) should be present at the output of the signal cables.

Check the output of the amplifier. Using the procedure explained in the previous check item (after plugging the input cables back into the amplifier) test for output at the speaker outputs of the amplifier. Unless you enjoy test tones at high levels, it is a good idea to remove the speaker wires from the amplifier while doing this. Turn the volume up approximately half way.

5V or more should be measured at the speaker outputs. This output level can vary greatly between amplifiers but it should not be in the millivolt range with the source unit at half volume. If you are reading sufficient voltage, check your speaker connections as explained below.

Check to ensure that the speaker wires are making a good connection with the metal inside the terminal block. The speaker wire connectors are designed to accept up to

12 AWG wire. Make sure that 1/2 inch (12 mm) of insulation has been stripped from the end of each wire and the bare wire is seated firmly in the terminal block so that no bare wire is exposed.

“MY AMPLIFIER’S OUTPUT FLUCTUATES WHEN I TAP ON IT OR HIT A BUMP”

Check the connections to the amplifier. Make sure that the insulation for all wires has been stripped back far enough to allow a good contact area inside the terminal block.

Check the input connectors to ensure that they all are making good contact with the input jacks on the amplifier.

“HOW DO I PROPERLY SET THE INPUT SENSITIVITY ON MY AMPLIFIER”

Please refer to Appendix A (page 10) to set the input sensitivity for maximum, low-distortion output.

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JL AUDIO e1800D

JL AUDIO e1800D

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JL Audio e1800D Appendix D Trouble Shooting MY Amplifier DOESN’T Turn on, MY Amplifier Turns ON, but There is no Output
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e1800D specifications

The JL Audio e1800D is an impressive monoblock amplifier designed for automotive audio enthusiasts seeking powerful and high-quality sound performance. This amplifier is part of JL Audio's e-series, which is known for delivering exceptional sound fidelity without compromising on reliability or efficiency.

One of the standout features of the e1800D is its robust power output. It is designed to deliver up to 1,800 watts RMS at a 1-ohm load, making it ideal for driving subwoofers that require significant power to achieve deep, resonant bass. The amplifier can also function effectively at higher impedances, delivering 1,200 watts RMS at 2 ohms and 600 watts RMS at 4 ohms. This versatility ensures that it can be paired with a variety of subwoofers, catering to different audio preferences and setups.

The e1800D incorporates advanced technology to enhance overall performance and sound quality. It features a Class D topology, which not only maximizes power efficiency but also minimizes heat generation. This allows for extended use without the risk of thermal throttling, making it a reliable choice for high-demand audio applications. Additionally, the amplifier is equipped with JL Audio’s proprietary R.I.P.S. (Regulated Efficiency Power Supply) technology, which ensures that consistent power is delivered regardless of the vehicle's electrical system fluctuations.

Another key characteristic of the e1800D is its extensive system controls. The amplifier includes low-pass and bass boost filters, allowing users to tailor the sound output to their preferences. The low-pass filter can be adjusted from 32 Hz to 200 Hz, providing flexibility in aligning the subwoofer with the rest of the audio system. The bass boost feature further enhances low-frequency response, giving users the ability to amplify specific bass notes to better suit individual tastes.

The e1800D is also designed with durability in mind. Its chassis is constructed from high-quality materials, ensuring longevity while keeping the unit lightweight. The amplifier’s compact design simplifies installation in tighter spaces within the vehicle, and its top-mounted controls allow for easy access and adjustments.

Overall, the JL Audio e1800D is a high-performance monoblock amplifier that excels in delivering powerful bass and exceptional sound quality. With its advanced technologies, customizable features, and robust construction, it is a top choice for those seeking to elevate their car audio experience. Whether for competitions or recreational listening, the e1800D stands out as a capable and reliable performer in the automotive audio landscape.
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