Meyer Sound Amie-Sub, Operating Instructions Manual

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CHAPTER 3: AMPLIFICATION AND AUDIO CONNECTORS
21
LF Limit LEDs
The low-frequency driver for Amie-Sub is powered by the
amplifier which includes a limiter. Limiting activity is
indicated with one of the two Limit LEDs on the user panel.
When engaged, the limiter not only protects the driver but
also prevents signal peaks from causing excessive
distortion in the amplifier channel, thereby preserving
headroom and maintaining smooth frequency response at
high levels. When levels return to normal, below the limiter
thresholds, limiting ceases.
Amie-Sub performs within its acoustical specifications at
normal temperatures when the Limit LED is unlit, or when
the LED is lit for 2 seconds or less and then turns off for at
least 1 second. If the LED remains lit for longer than
3 seconds, the loudspeaker enters hard limiting where:
•
Increases to the input level have no effect
•
Distortion increases due to clipping
•
Drivers are subjected to excessive heat and excursion,
thereby compromising their lifespan
CAUTION: The Limit LED indicates when a
safe, optimum level is exceeded. If an Amie-
Sub loudspeaker system begins to limit before
reaching the desired SPL, consider adding more
units to the system.
AMPLIFIER COOLING SYSTEM
CAUTION: The Amie-Sub loudspeaker is
convection cooled. The amplifier’s heat sink
provides natural convection cooling from the
air flowing near its fins.
CAUTION: The Amie-Sub heat sink can reach
temperatures up to 80° C (176° F) during
extreme operation. Wait 15 minutes for the unit
to cool before touching.
ON/STATUS LED
During normal operation, when Amie-Sub is powered on,
the On/Status LED is solid green. If the loudspeaker
encounters a hardware fault, or the unit begins to overheat,
the LED flashes red. In some instances, the loudspeaker will
continue to output audio while the LED flashes red, though
with a reduction in the limiter threshold and acoustic output
to protect the loudspeaker.
If a loudspeaker is overheating, a reduction in SPL may be
necessary. If after a reduction in SPL and an appropriate
cooling period the On/Status LED continues to flash red
(does not return to solid green), contact Meyer Sound
Technical Support.
If the On/Status LED flashes red and the loudspeaker does
not output audio, contact Meyer Sound Technical Support
immediately.
CAUTION: If an Amie-Sub loudspeaker system
consistently overheats before reaching the
desired SPL, consider adding more units to the
system.
NOTE: During startup, the Active/Status LED
flashes multiple colors successively. For more
information about the power on sequence, see
“Intelligent AC Power Supply” on page 14.
Figure 16: Amie-Sub Limit LEDs
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