Meyer Sound Self-Powered Loudspeaker Systems USM-P Series User Manual
Page 9
T
HE AUDIO PRODUCED BY THE SPEAKER
IS DISTORTED OR COMPRESSED BUT THE
LIMIT LIGHT IS NOT ILLUMINATED
.
1. Make sure the XLR cable is securely
fastened to the XLR audio input con-
nector.
2. Send the audio signal to another
speaker to insure that the level is
within the proper range. Turn the
source level down before reconnect-
ing the audio input and increase the
level slowly to avoid a sudden blast
of sound.
3. Monitor the audio source with head-
phones.
T
HE AUDIO PRODUCED BY THE SPEAKER
IS HIGHLY COMPRESSED AND THE LIMIT
LIGHT IS CONSTANTLY YELLOW
.
1. Turn down the level of the input sig-
nal to the speaker system.
O
NLY THE HIGH OR LOW DRIVER SEEMS
TO PRODUCE SOUND
.
1. Make sure the audio signal is full-
range and has not been filtered in a
previous stage of the signal chain. If
possible, monitor the audio source
with high-quality headphones.
2. Send the audio signal to another
speaker to insure that the signal is
full-range. Turn the source level down
before reconnecting the audio input
and increase the level slowly to avoid
a sudden blast of sound.
3. Use a sine wave and/or pink noise
generator to send a variety of fre-
quencies to the speaker.
T
HERE IS SOME SOUND BUT THE
O
N
/T
EMP
. LED
TURNS FROM GREEN TO
RED
.
This occurs when the heatsink tempera-
ture reaches 85°C (185°F), indicating
that the amplifier is thermally over-
loaded. The limiter threshold has
dropped to a safe level, so the audio
level is probably reduced.
1. Make sure there is enough clearance
above, below, and behind the unit.
2. Make sure there is sufficient air flow
around the unit.
3. Avoid exposing the heatsink to direct
sunlight if the ambient temperature
is high.
4. If the ambient temperature is greater
than 30°C and this condition occurs
frequently, contact Meyer Sound to
order the optional Fan Kit.
See the section Amplification, Limiting,
and Cooling System on page 6 for a
complete discussion about the cooling
system.
T
HERE IS NO SOUND
,
THE
O
N
/T
EMP
.
LED
IS DIM OR OFF
,
AND THE POWER
SUPPLY FAN IS ON HIGH SPEED
.
This extremely rare event occurs when
the power supply overheats, causing a
1-2 minute interruption in operation.
The unit turns on again when the power
supply has cooled sufficiently.
1. Make sure there is at least six inches
clearance behind the unit.
2. Make sure there is sufficient air flow
around the unit.
3. Avoid exposing the unit to direct
sunlight in high ambient temperature.
See the section Amplification, Limiting,
and Cooling System on page 6 for a
more information about the power sup-
ply's internal fan and cooling system.
9