15. Power on/off
16.
LED lighting on/off
Placement Tips
-Avoid placing loudspeakers in the corners of a room. This increases the
low-frequency output and can cause the sound to be muddy and indistinct.
-Avoid placing loudspeakers against a wall. This, too, increases the low frequency
output, though not as much as corner placement. However, if you do need to
reinforce the low frequencies, this is a good way to do it.
-Avoid placing the active speakers directly on a hollow stage floor. A hollow stage can
resonate at certain frequencies, causing peaks and dips in the frequency response
of the room. It’s better to place the speakers on a sturdy table or tripod stands.
-Position the speakers so the high-frequency drivers are two to four feet above ear
level to the audience to maintain high frequency quality.
Troubleshooting
No Power
-First check to make sure the speaker is plugged in to a live AC outlet.
Make sure the POWER switch is on.
No Sound
-Make sure input LEVEL control turned up.
-Make sure signal source is working and the connecting cables are in good shape and
securely connected at both ends. Make sure the output volume control on the mixing
console is turned up.
-
Make sure the preamp or mixer does not have a Mute button engaged.
Bad Sound – Noise - Humming
If the sound is loud and distorted, verify that the levels are set properly on the speaker
and mixing console.
Make sure all connectors are secure and they are plugged in to the proper connector
(i.e., Mic cable plugged in to MIC input, Line level source plugged in to Line Level
Input. It is a good idea to periodically clean all electrical connections with a
non-lubricating electrical contact cleaner.
Make sure none of the signal cables are routed near AC cables, power transformers
or other electrical power cords.
If humming occurs, turn the LEVEL control of the speaker all the way down. If the
noise disappears, it’s coming from the signal source. If not, try disconnecting the
cable connected to the INPUT jack. If the noise disappears, it could be a “ground
loop,” Try the following ideas:
o
Use balanced connections throughout your system for best noise rejection. (XLR
