10 19
To manage the additional heat associated with higher output capability, a thermally
controlled fan has been designed into the PCX 480 and PCX 4125. When the
heatsink temperature reaches a pre-determined value, the fan is activated
and cool air is drawn in through the lower intake vents on the endplate. This cool
air flows below the circuit board, through the fan and across the internal f i n s ,
cooling the heatsink. The warm air is then forced out through the upper end-
plate exhaust vents.
1. Cooling Plenums: Maintain a minimum 2” clearance around cooling plenums for proper amplifier
cooling.
2. Forced Air Thermal Management Intake/Exhaust Plenums
3. QBASS™ Level: Turn this control clockwise to boost the QBASS REMOTE™ dash mount level
control here. (this will bypass the amplifier’s on board QBASS™ control)
4. QBASS REMOTE™ plug in: Plug in the data cable from the optional QBASS REMOTE™ dash
mount level control here. (This will bypass the amplifier’s on board QBASS™ control)
5. Power / Ground PowerLock: Plug in the Power/Ground PowerLock connector here.
6. Power indicator: A green light indicates that the amplifier is on.
PCX 440
PCX 480,4125,5800
1
5
6
2
3
4
5
6
Short Circuit Protection engaged: The amplifier will turn off and try to come
back on immediately. The amplifier will cycle like this indefinitely, with "blips" of
sound each time. If this is the case, check your speakers and wiring for low
impedance and short circuits.
Thermal Protection engaged: The amplifier will turn off and several minutes
later will come back on. In this case, ensure that there is nothing blocking the
normal convective airflow of the amplifier. No obstruction should be within 2" of
the amplifier on all sides.
NOTE: Low battery voltage will cause the amplifier to run warmer and
possibly damage the amplifier.
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