User's Manual
Table Of Contents
16 • English L1 Pro8/Pro16 Portable Line Array System • Owner's Guide
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Care & Maintenance
Care & Maintenance
Cleaning Your L1 Pro
Clean the product enclosure using only a soft, dry cloth. If necessary, carefully vacuum the grille of the L1Pro.
 CAUTION: Do not use any solvents, chemicals, or cleaning solutions containing alcohol, ammonia, or 
abrasives.
CAUTION: Do not use any sprays near the product or allow liquids to spill into any openings.
Troubleshooting
Problem What to do
No power •  Make sure you have power at the AC outlet. Try operating a lamp or other 
equipment from the same AC outlet or test the outlet using an AC outlet 
tester.
No sound •  Make sure your L1 Pro is turned on.
•  Make sure your instrument is plugged into the Channel Input.
•  Make sure the volume is turned up on your source.
•  Make sure the volume is turned up on the L1 Pro.
•  Make sure the L1 Pro isn't in AutoO/Low-power Standby mode.
•  Plug your instrument into a dierent amplifier to make sure the source is 
working.
•  Make sure the Channel Mute button is not engaged. 
Standby LED is flashing 
red (thermal fault)
•  Turn o the L1 Pro and wait 30 minutes before turning it back on.
•  Move the L1 Pro to a cooler location.
•  Move the L1 Pro to a location that has more ventilation. 
Standby LED is solid red 
(system fault)
•  Please call Product and Technical Support at (877) 335-2673. 
With nothing plugged 
into the L1 Pro, a light 
hum or buzz is heard
•  Using an AC outlet tester, test the AC outlet the L1 Pro is plugged into for 
reversed or open (hot, neutral, and/or ground) contacts.
•  If using an extension cord, plug the L1 Pro directly into the outlet. 
Instrument or audio 
source sounds distorted
•  Turn down volume on the source.
•  Turn down channel volume.
•  Try a dierent source or instrument. 
Microphone is 
encountering feedback
•  Turn down channel volume.
•  Orient the microphone so that it is not pointing directly at the L1 Pro.
•  Try a dierent microphone.
•  Try a dierent position for the L1 Pro and/or vocalist on stage.
•  Increase the distance from the L1 Pro to the microphone.
•  If using a vocal eects processor, make sure it is not contributing to the 
feedback problem. 










