Meyer Sound UltraCompact High-Power Curvilinear Array Loudspeaker M'elodie User Manual
Page 19
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CHAPTER 3
M’elodie is performing within its acoustical specifications
and operating at a normal temperature if the limit LEDs are
lit for no longer than two seconds, and then go off for at
least one second. If an LED remains on for longer than three
seconds, that channel enters
hard limiting, with the follow-
ing negative consequences:
■
Increasing input level will not increase volume.
■
Distortion increases due to clipping and nonlinear driver
operation.
■
The lifespan of the driver is reduced because it is sub-
jected to excessive heat and/or excursion, and eventual
damage over time may occur.
NOTE:
The limiting circuitry utilizes optical
limiters that add no noise and have no effect
on the signal when the limiter is not engaged and
the LED is inactive.
COOLING SYSTEM
The M’elodie amplifier modules rely solely on natural
convection for cooling. The heatsinks used in the amplifier
modules allow natural convection cooling from air flowing
over the heatsink. The efficient design of the amplifier and
heatsink profile helps keep the temperature on the amplifier
low even when the loudspeakers are being used at high
ambient temperature, in tightly packed conditions, and/or at
high continuous levels.
If the temperature of the heatsink reaches 75° C (167° F),
the On/Temp. LED on the rear panel turns from green (On)
to red (Temp.). The unit continues to operate normally even
if the On/Temp LED is red, but this is an indication that the
unit is reaching its maximum dissipation. A reduction of the
SPL is recommended at this point.
NOTE:
In the highly unlikely event that the
heatsink temperature reaches 95˚ C (203° F),
the M’elodie loudspeaker automatically shuts down
until AC power is removed to allow the heatsink to
cool down. If the M’elodie loudspeaker shuts down
again after cooling and reapplying AC power, con-
tact Meyer Sound for repair information.
CAUTION:
The heatsink can reach
temperatures of up to 95° C (203° F) during
extreme, high-level operation for extented periods of
time. Use caution when approaching the rear of the
cabinet.
CAUTION:
To keep the heatsink from getting
too hot, ensure proper ventilation around the
loudspeaker.
When the heatsink temperature decreases to 65° C (145° F),
the On/Temp LED changes from red to green.
CAUTION:
If loudspeakers in a system begin
to shut down due to excessive heatsink
temperatures before reaching the required SPL,
consider adding more loudspeakers to satisfy the
SPL requirements.
TIP:
The RMS remote monitoring system
can be used monitor the temperature of the
heatsinks.