Mackie SP2400 Instruction Manual - All - Page 15
AC Power Considerations, Thermal Considerations, Voltage Conversion
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AC Power Considerations Each SP2400 draws an average of 6 amps of AC line current (@ 120VAC) when fully loaded and playing music with a relatively high crest factor. Voltage Conversion The SP2400 can be configured to operate at 115V AC or 230V AC. See Appendix C for instructions on how to change the operating voltage configuration. Thermal Considerations IMPORTANT: The SP2400 is convection cooled rather than fan cooled. This design was chosen to avoid the requirement for periodic air filter maintenance, and to keep the insides of the SP2400 clean in dirty environments (rather than blowing dirty, smoky air into it). Heat is drawn away from the amplifiers by the heatsinks and radiated through the cooling vents in the top cover. When installing the SP2400, be sure to allow sufficient air space around the top and rear of the amplifier to allow adequate cooling for the heatsinks. If installing in a rack, leave at least one rack space above and below the SP2400 for a vent, and at least 6 inches behind the chassis to allow proper ventilation. If installing three or more SP2400s in a rack, use a fan in the rack to move cool air in and warm air out of the rack's enclosure. It may be necessary to provide a cool air intake fan at the bottom of the rack, and a warm air exhaust fan at the top (see Figure below). Note: Though it is not required, it is recommended that a warm air exhaust fan be used when two SP2400s are installed in the same rack. If the amplifier should overheat, a thermal switch is activated that disengages the speaker outputs, allowing the heatsinks to cool down. The OVERLOAD indicator on the front panel will also light to show that a protection circuit has been activated. Once the amplifier has cooled to a safe operating temperature, the thermal switch resets and reactivates the speaker outputs. If this should occur, identify the cause of the problem and take corrective action (i.e., provide better ventilation, install a fan in the rack to move more air, make sure the amplifier is not overloaded with too low of a load impedance). 2U Exhaust Fan Panel HoEt Axhiraust 1U Vent Panel 1U Vent Panel 2U Vent Panel (or Optional Intake Fan) CoolInAtairke CoolInAtairke CoolInAtairke CoolInAtairke CoolInAtairke SP2400 - 15
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