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Amplifier Status LED Colors and What they Represent
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
Low Impedance/Over Current:
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
Low Voltage:
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.