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CHAPTER 2: ULTRA XP LOUDSPEAKERS
ON/STATUS LED
The On/Status LED on the user panel indicates whether an
Ultra XP loudspeaker is operating normally (green), over-
heating (yellow), or clipping (red).
Normal Operation (Green)
The On/Status LED is green during normal operation, when
the loudspeaker is powered on.
Overheating and Limiter Threshold (Yellow)
The On/Status LED turns solid yellow when the loud-
speaker's internal temperature reaches 75° C (167° F), indi-
cating the unit is reaching its maximum heat dissipation.
When the On/Status LED is yellow, a reduction in SPL is rec-
ommended. While the loudspeaker will continue to operate
while the On/Status LED is yellow, the limiter threshold is
lowered by 6 dB (causing the output level to also be
reduced) to prevent the loudspeaker from overheating.
When the internal temperature cools to 60° C (140° F), the
On/Status LED changes from yellow to green and the limiter
threshold returns to normal.
Amplifier Cooling System
Amplifiers for Ultra XP loudspeakers rely solely on natural
convection for cooling from air flowing over their heat sinks.
The efficient amplifier and heat sink design keeps tempera-
tures low, even when units are operated at high ambient
temperatures, in tightly packed configurations, and driven
continuously at high output levels.
CAUTION:
The Ultra XP loudspeaker's heat
sink can reach temperatures up to 75° C
(167° F) during extreme operation. Use extreme cau-
tion when approaching the rear of the loudspeaker.
Clipping on Input (Red)
The On/Status LED turns red when the loudspeaker's input
stage clips. When the On/Status LED is red, the source level
should be reduced to avoid distortion and to avoid overload-
ing the amplifier.
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