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ACHERON DESIGNER OPERATING INSTRUCTIONS
15
ON/STATUS LED
During normal operation, the Acheron Designer’s On/Status
LED is green. If the loudspeaker’s internal temperature
reaches 75° C (167° F), the LED turns solid yellow and the
loudspeaker’s gain is reduced by 3 dB. Though the
Acheron Designer will continue to operate normally with the
lower gain, when the On/Status LED is yellow, this is an indi-
cation that the loudspeaker is reaching its maximum heat
dissipation and a reduction in SPL is recommended. When
the loudspeaker’s internal temperature cools to 60° C
(140° F), the amplifier returns to normal operation.
CAUTION: If the loudspeaker’s internal tem-
perature reaches 125° C (257° F), gain is
reduced by 6 dB to avoid damage to the loud-
speaker.
TIP: When the Acheron Designer is connected
to an RMS network, the RMS software provides
additional feedback on the loudspeaker’s operating
temperature. For more information, see Chapter 6,
“RMS Remote Monitoring System.”
Amplifier Cooling System
The Acheron Designer’s amplifier relies solely on natural
convection for cooling from air flowing over its heat sink.
The rear-mounted, recessed heat sink yields efficient cool-
ing and allows the unit to be placed flat against walls, when
necessary. The amplifier and heat sink keep temperatures
low, even when the unit is used at high ambient tempera-
tures, and when driven continuously at high output levels.
CAUTION: The Acheron Designer’s heat sink
can reach temperatures of up to 85° C (185° F)
during extreme operation. Use extreme caution when
approaching the rear of the loudspeaker.
Heat Sink Ventilation Requirements
When installing the Acheron Designer flush against walls, or
when mounting them in soffits or baffle walls, make sure to
allow plenty of ventilation above the loudspeaker.
■ When installing the Acheron Designer in a soffit with the
loudspeaker flush against the back of the soffit (see
Figure 2), allow at least 6 inches above the loudspeaker
for ventilation.
!
!
Figure 2: Acheron Designer Mounted in Soffit, Flush Against Back
of Soffit with 6” of Ventilation Above Loudspeaker
6.00
[152 mm]