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CHAPTER 2: MPS-482HP FRONT AND REAR PANELS
MPS-482HP Channel Outputs
The MPS-482HP channel outputs are Phoenix 5-pin male
connectors with three pins for balanced audio (positive,
negative, and shield) and two pins for DC Power (positive and
negative). The pins are clearly labeled on the MPS-482HP rear
panel.
MPS-482HP Channel Outputs
MPS-482HP CURRENT DRAW
The current draw for the MPS-482HP and its connected
loudspeakers is dynamic and fluctuates as operating levels
change. Since different cables and circuit breakers heat up
at varying rates, it is important to understand the following
types of current ratings and how they affect circuit breaker
and cable specifications.
Idle Current: the maximum rms current during idle
•
periods.
Maximum Long-Term Continuous Current: the
•
maximum rms current during a period of at least 10
seconds. The maximum long-term continuous current is
used to calculate temperature increases for cables to
ensure that cable gauge and size conform to electrical
code standards. This current rating is also used as a
rating for slow-reacting thermal breakers, which are
recommended for loudspeaker power distribution.
Burst Current: the maximum rms current during a
•
period of around 1 second. The burst current is used as
a rating for magnetic breakers. It is also used for
calculating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
Maximum Instantaneous Peak Current: a rating for
•
fast-reacting magnetic breakers.
Inrush Current: the spike of initial current encountered
•
when powering on.
For current draw values for the MPS-482HP with connected
loudspeakers, see Appendix C, "MPS-482HP
Specifications."
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The minimum electrical service amperage required by an
MPS-482HP is the sum of the maximum long-term continuous
current for all loudspeakers connected to the MPS-482HP. An
additional 30 percent above the minimum amperage is
recommended to prevent peak voltage drops at the service
entry.
NOTE:
For best performance, the AC cable
voltage drop should not exceed 10 V, or
10 percent at 115 V and 5 percent at 230 V. Make
sure that even with AC voltage drops that the AC
voltage always remains within the operating window.
ELECTRICAL SAFETY GUIDELINES
Pay close attention to these important electrical and safety
guidelines.
This Meyer Sound product requires a grounded outlet.
•
Always use a grounded outlet and plug.
Earth Ground
Chassis Ground
Do not use a ground-lifting adapter or cut the AC cable
•
ground pin.
The AC power connector must not be engaged or
•
disengaged when under load or live.
Disconnect the mains plug before disconnecting the
•
powerCON plug from the unit.
Keep all liquids away from the unit to avoid hazards from
•
electrical shock.
Do not operate the unit if the power cable is frayed or
•
broken.
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