PRESONUS AIR SERIES, Owner'S Manual

5 

Troubleshooting and Warranty 

5.1 

Support and Troubleshooting 

AIR-Series Loudspeakers 

Owner’s Manual

11

5

Troubleshooting and Warranty

5.1 

Support and Troubleshooting 

Please check the PreSonus Web site (

www.presonus.com

) regularly 

for software information and updates, firmware updates, and support 
documentation, including frequently asked questions.
Online technical support is available at www.presonus.
com/support/Contact-Technical-Support.
Technical support is available via email at techsupport@presonus.com.
PreSonus telephone technical support is available to customers in the USA on 
Monday through Friday from 9 a.m. to 5 p.m. Central Time by calling  
1-225-216-7887. Customers outside of the USA should contact their national 
or regional distributor for telephone technical support. A list of international 
distributors is provided at www.presonus.com/buy/international_distributors.

Loudspeaker won’t turn on.

If the loudspeaker is plugged in, and the switch is on, 
but no LEDs illuminate, check the following:

•  Make sure the power cord is fully and securely inserted 

in the IEC receptacle and in the wall outlet.

•  Confirm that the AC outlet is “live,” using a tester or other 

device (such as a lamp) that is known to be working.

Loudspeaker is on but there’s no sound.

Check to make sure the signal is “live” from an external source. Check that output 
faders are up on the mixing console and check the output level using headphones.
If another speaker in a stereo configuration is working, swap input 
cables. If the problem moves, replace the faulty cable.
If the loudspeaker has been producing sound at high levels and 
then stops, it may have gone into thermal muting. Allow the unit to 
cool, and make sure the heat sink has sufficient ventilation.

Sound breaks up intermittently. 

Check the input sources, using headphones, if possible, 
to determine if the problem is with the source.
Check console outputs and all input and loop-thru connectors to make sure they 
are securely plugged in. If the problem persists, try replacing cables with spares.

Loudspeaker has hum or buzz.

Nearly all hum and buzz problems are related to cable grounding. With 
the loudspeaker at low volume, remove input and output cables, one at 
a time, until the noise disappears. Try replacing the suspect cable.
If you are using two-conductor cables with unbalanced ¼” connectors, 
try replacing with balanced cables using TRS or XLR connectors.
Try plugging loudspeakers and the external mixer into outlets that 
share a common ground. If necessary, use an extension cord to plug 
the external mixer into the same outlet as the loudspeaker—but do 
not run the AC cord bundled with the audio signal cables.