AC Power Considerations
Each SP1200 draws an average of 3 amps of AC line current (@ 120VAC) when fully loaded and playing music with a relatively high crest factor.
Voltage Conversion
The SP1200 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 SP1200 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 SP1200 clean in dirty environments. This avoids 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 SP1200, 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 SP1200 for a vent, and at least 6 inches behind the chassis to allow proper ventilation.
If installing three or more SP1200s 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).
If the amplifier should overheat, a thermal switch is activated that disengages the speaker output, allowing the heatsink 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 tem- perature, the thermal switch resets and reactivates the speaker output. If this should occur, identify the cause of the problem and take corrective action, such as providing better ventilation, installing a fan in the rack to move more air, making sure the amplifier is not overloaded with too low of a load impedance, etc.
HotAir
2U Exhaust Fan Panel
1U Vent Panel
SP1200 | MUSIC | CONTROLLER |
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Air
CoolIntake
1U Vent Panel
SP1200 | MUSIC | CONTROLLER |
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| Intake |
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| SP1200 | MUSIC | CONTROLLER |
2U Vent Panel |
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(or Optional Intake Fan) |
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Air |
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Cool | Air |
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Intake |
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| Cool | Air |
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| Cool |
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SP1200 – 15