All JL Audio amplifiers have built-in LED's that signify the operational status of that amplifier. It may show that the amplifier is working correctly, or identify a problem with the amplifier, installation or audio system itself. Read below for a list of what the various LED colors are identifying and some troubleshooting solutions to situations that are being identified.
VXi Amplifiers
| LED/Location | Behavior | Status/Condition |
| LED Ring/ Amplifier Top |
Flashing White |
No Project File Loaded |
| Flashing Blue | Critical Voltage (too low) | |
| Flashing Red | Critical Temperature (too high) | |
| Flashing Yellow | Excessive Current (low impedance/short) | |
|
Upper Left LED / JLid-COMM Port and JLid-CTRL Port |
Green |
Detecting JLid™ Device |
|
Blue |
JLid™ Connection Success | |
| Yellow | Invalid JLid™ Device | |
| Flashing Red | Excessive Current | |
|
Upper Right LED / JLid-COMM Port
|
Flashing Red |
Critical Voltage/Temperature |
| Excessive Remote Output Current | ||
| Green | Active TüN™ Connection |
MVi Amplifiers
| LED/Location | Behavior | Status/Condition |
| LED/Amplifier Top |
Flashing White |
No Project File Loaded |
| Flashing Blue | Critical Voltage (too low) | |
| Flashing Red | Critical Temperature (too hot) | |
| Flashing Yellow | Excessive Current (low impedance/short) | |
|
Upper Left LED / JLid-COMM Port |
Green |
Detecting JLid™ Device |
|
Blue |
JLid™ Connection Success | |
| Yellow | Invalid JLid™ Device | |
| Flashing Red | Excessive Current | |
|
Upper Right LED/ JLid-COMM Port |
Flashing Red | Critical Voltage/Temperature |
| Excessive Remote Output Current | ||
| Green | Active TüN™ Connection |
HD / MHD Amplifiers
| LED COLOR | DESCRIPTION |
| Green Flashing | Amplifier is powering up. |
| Green Solid | Amplifier is powered and functioning properly. |
| Red | Amplifier has reached its thermal limits. Advanced Rollback Protection engaged. |
| Amber (Yellow) | Low Impedance |
| Green/Red (Alternating) | Low voltage |
Slash v3 Amplifiers
| LED COLOR | DESCRIPTION |
| Green | Amplifier is powered and functioning properly. At least 10v DC are detected. |
| Red | Amplifier has reached its thermal limits. Advanced Rollback Protection engaged. |
| Amber (Yellow) | Low Impedance |
| Blue* | Low voltage (Under 8v). Amplifier turns off at 8v DC and turns back on when 9v DC is detected. |
* 1200/1v3 only
XDv2 / M-Series Amplifiers
| LED COLOR | DESCRIPTION |
| Green Flashing | Amplifier is powering up |
| Green Solid | Amplifier is powered and functioning properly. At least 10v DC is detected. |
| Red | Amplifier has reached its thermal limits. Advanced Rollback Protection engaged. |
| Amber (Yellow) | Low Impedance |
RD Amplifiers
| LED COLOR | DESCRIPTION |
| Blue | Amplifier is powered and functioning properly. At least 10v DC is detected. |
| Red Constant | Amplifier has reached its thermal limits. Output is muted until safe operating temperature detected. |
| Red Temporarily (1/2 Second) | Low Impedance/Over Current, output muted. Will attempt to restart amplifier (Blue LED) |
| Red/Blue (Alternating) | Continuous over current condition. May be audibly heard as repetitive ticking or thumping. |
MX Amplifiers
| LED COLOR | DESCRIPTION |
| Green | Amplifier is powered and functioning properly. At least 10v DC is detected. |
| Red | Amplifier has reached its thermal limits or too low of an impedance detected. Output is muted until safe operating temperature detected. OR There is a short circuit, an audible "popping" noise might be heard. |
| Green/Red (Alternating) | Low Impedance/Over Current |
JD Amplifiers
| LED COLOR | DESCRIPTION |
| Blue | Amplifier is powered and functioning properly. At least 10v DC is detected. |
| Red (Constant) | Amplifier has reached its thermal limits. Output is muted until safe operating temperature detected. |
|
Red (Constant/Flashing) |
Low Impedance/Over Current |
Troubleshooting
Thermal Protection (Amplifier reaches unsafe operating temperature):
- Ensure Input Sensitivity is properly set (Learn how to Properly Set Input Sensitivity)
- Reduce any excessive boost
- Final impedance load is within amplifier's operating range (Read the Speaker Wiring Tutorial and how to wire SVC & DVC subwoofers)
- Excessive resistance at the power/ground inputs due to:
- Improper grounding
- Insufficient sized power & ground wire
- Copper Clad Aluminum (CCA) wire being used
- Lose or insecure connections
- Amplifiers are close to a heat source and or poor ventilation
- Incorrect speaker(s) used (measure voice coil impedance with digital volt meter)
- Speaker(s) improperly wired (Read the Speaker Wiring Tutorial and how to wire SVC & DVC subwoofers)
- Blown or damaged voice coil
- Short in wiring
- Measure input voltage & current draw at amplifier
- Check alternator's current output compared to amplifier current draw
- Insufficient sized power & ground wire (Read about Choosing the Correct Power Wire)
- Using Copper Clad Aluminum (CCA) instead of Oxygen Free Copper (OFC)
- Improper grounding (Read about Augmented Grounds)
Blinking White LED (VXi/MVi)
- Download and install TuN software. Once installed, connect the powered on VXi/MVi amplifier to TuN software to transfer a project file onto it, or start a new project.