G1700 JL Audio Troubleshooting Guide for Stereo Amplifier

Appendix D: TROUBLESHOOTING

“How do I properly set the input sensitivity on my amplifier”

Please refer to Appendix A (page 12) to set the input sensitivity for maximum, low-distortion output.

“My amplifier doesn’t turn on”

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.

Check the integrity of the connections made to each of the “+12VDC”, “Ground”, and “Remote” terminals. Ensure that no wire insulation is pinched by the terminal set screw and that each connection is tight.

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 “+12VDC” wire to the “Remote” terminal to see if the amplifier turns on. If this does not work, proceed to the next step.

“I get a distorted / attenuated sound coming out of the speaker(s)”

Check the speaker wires for a possible short, either between the positive and negative leads or between either speaker lead and the vehicle’s chassis ground. If a short is present, you will experience distorted and/or attenuated output. The “Protect” light will illuminate in this situation. It may be helpful to disconnect the speaker wires from the amplifier and use a different set of wires connected to a test speaker.

Check the nominal load impedance to verify that of the amplifier is driving a load equal to or greater than 2 ohms.

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’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.

“My amplifier shuts off once in a while, usually at higher volumes”

Check your voltage source and grounding point. The power supply of the G1700 will operate with charging system voltages down to 10V. Shutdown problems at higher volume levels can occur when the charging system voltage drops below 10V. 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 misdiagnosed 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 8.0-volts) 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 8 AWG wire. Make sure to strip the wire to allow for a sufficient connection with the metal inside the terminal block.

JL AUDIO G1700

G1700 specifications

JL Audio is renowned for delivering high-quality audio solutions, and the G1700 amplifier exemplifies this reputation. As part of the G-Series amplifiers, the JL Audio G1700 is designed to provide superior performance in a compact package, making it an ideal choice for automotive applications where space is limited but excellent sound quality is essential.

One of the standout features of the G1700 is its efficient Class D topology. This technology allows the amplifier to deliver impressive power output while minimizing heat production, making it perfect for prolonged use without the risk of overheating. With a power output of 75 watts per channel at 4 ohms and 100 watts per channel at 2 ohms, the G1700 ensures that your speakers receive ample power for crisp and clear sound reproduction across a wide frequency range.

Another key characteristic of the G1700 is its compact design. Measuring just 9.5 inches in width, this amplifier can be easily installed in tight spaces within your vehicle. Despite its small size, it does not compromise on performance. The high-quality construction and components used in the G1700 ensure durability and reliability, even in the challenging conditions often found in automotive environments.

Equipped with advanced technologies, the G1700 features differential-balanced inputs to reduce noise and interference, ensuring a clean signal from your source unit to the amplifier. Additionally, it offers comprehensive signal processing capabilities including variable high-pass and low-pass filters, allowing users to tailor the audio output to match their specific setup. This level of customization contributes to a more refined listening experience tailored to individual preferences.

The G1700 amplifier is also designed with user-friendly features in mind. Its intuitive controls make it easy to adjust settings on-the-fly. This simplicity is appreciated by both audiophiles who want detailed tuning options and casual listeners who prefer ease of use.

In summary, the JL Audio G1700 amplifier combines innovative design, efficient power handling, and user-friendly controls, making it a superb choice for anyone looking to enhance their vehicle's audio system. With its impressive technical specifications and thoughtful engineering, the G1700 stands out as a reliable solution for audiophiles and casual listeners alike, ensuring that every drive is accompanied by outstanding sound quality.