10
THERMAL CONDITIONS
The ISP XMAX112 Sub Series is capable of producing 1000 watts at full power. This generates
heat that must be dissipated in order to maintain reliability and insure the amplifier components
stay within their operating temperature specs. To accomplish this, the amplifier is mounted onto
a heatsink that requires air movement at the rear of the cabinet. It is recommended that the rear
of the cabinet have at least 6 inches of clearance from any obstruction to allow proper ventilation
to occur.
The internal amplifier is cooled with a small fan. The XMAX112 is designed such that the
temperature should never exceed a level where the global thermal protection becomes active. If
the internal fan fails or the ventilation system is blocked so that airflow is impeded the global
thermal protect may activate, which will attenuate the signal 40db when the temperature
exceeds a preset point. When the temperature drops below a certain point, full signal will be
restored. Tests have shown under extreme conditions that cycling will occur (40 sec. ON, 20
sec. OFF). If the global thermal protection becomes active, determine the cause for the lack of
proper cooling. Correcting the problem will allow the XMAX112 to continue correct operation.
Summary of Contents for Xmax 112
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