USW-112XP LED
The USW-112XP uses the three-color LED on its rear panel to indicate the loudspeaker’s status.
USW-112XP LED - Limit and Status Indicator
Power On (Green)
When powering up the USW-112XP loudspeaker, the following startup events occur and are indicated by the LED:
The LED flashes all colors during power-up.
After a few seconds, the LED lights solid green, indicating the loudspeaker is ready to reproduce audio.
Caution
If the power-up sequence leaves the LED flashing multiple colors or solid red, and it does not produce audio, the loudspeaker has encountered an error and may need to be serviced. Contact Meyer Sound Technical Support.
If the power-up sequence leaves the LED solid red and the loudspeaker outputs audio, its voltage may have dropped below 25 V DC. Cease operation immediately and verify its power supply and cabling.
Limiting (Yellow)
The USW-112XP LED illuminates yellow when the loudspeaker’s signal rises 2 dB above the limiting threshold, indicating that a safe, optimal level has been exceeded. When limiting is engaged, gain is reduced. The limiter protects the driver and prevents signal peaks from causing excessive distortion in the amplifier, thereby preserving headroom and maintaining a smooth frequency response at high levels. When source levels return to normal below the limiter’s threshold, the LED turns green and limiting ceases.
The USW-112XP performs within its acoustical specifications at normal temperatures when the USW-112XP LED is green, or when limiting is not continuous. During continuous limiting, the loudspeaker is nearing its operational limits, resulting in the following effects:
Increasing the input level has no effect.
Distortion increases due to clipping and nonlinear driver operation.
The driver is subjected to excessive heat and excursion, which compromises its life span and may eventually damage it.
Caution
If the USW-112XP loudspeakers in a system begin to limit before reaching the desired SPL, Meyer Sound recommends adding more loudspeakers to the system to achieve the desired SPL without exposing them to the hazardous conditions listed above.
Clipping (Red)
The USW-112XP LED turns red when the loudspeaker’s input stage clips, causing the amplifier to overload. The source level must be reduced.
Caution
If the USW-112XP LED turns solid red and the loudspeaker continues to output audio, though at reduced levels, the loudspeaker’s voltage may have dropped below 25 V DC. Cease operation immediately and verify its power supply and cabling.