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CHAPTER 3: POWERING MM-10XP SUBWOOFERS WITH THE MPS-488HP
16
MPS-488HPp Channel Outputs
The MPS-488HPp Channel Outputs use Phoenix 5-pin male
connectors with three pins for balanced audio (positive, neg-
ative, and shield) and two for DC Power (positive and nega-
tive). These pins are clearly labeled on the MPS-488HPp rear
panel.
Each MPS-488HPp comes with eight Phoenix 5-pin female
cable connectors for assembling loudspeaker cables.
MPS-488HPe Channel Outputs
The MPS-488HPe Channel Outputs use EN3 5-pin female
connectors with three pins for balanced audio (positive,
negative, and shield) and two for DC Power (positive and
negative). These pins are clearly labeled on the
MPS-488HPe rear panel.
Each MPS-488HPe comes with eight EN3 5-pin male cable
connectors for assembling loudspeaker cables.
MPS-488HP CURRENT DRAW
The current draw for the MPS-488HP 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 sec-
onds. The Maximum Long-Term Continuous Current is
used to calculate temperature increases for cables, to
ensure that cable sizes and gauges conform to electrical
code standards. This current rating is also used as a rat-
ing for slow-reacting thermal breakers.
■ Burst Current — The maximum rms current during a
period of around one second. The Burst Current is used
as a rating for magnetic breakers. It is also used for cal-
culating the peak voltage drop in long AC cable runs
according to the following formula:
V pk (drop) = I pk x R (cable total)
■ Ultimate Short-Term Peak Current — A rating for fast-
reacting magnetic breakers.
■ Inrush Current — The spike of initial current encoun-
tered when powering on.
You can use the following table as a guide for selecting
cable gauges and circuit breaker ratings for the system’s
operating voltage.
The minimum electrical service amperage required by an
MPS-488HP is the sum of the Maximum Long-Term Contin-
uous Current for all MM-10XPs connected to the MPS-488HP.
An additional 30 percent above the minimum amperage is rec-
ommended 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.
MPS-488HPp Channel Outputs
MPS-488HPe Channel Outputs
Current Draw for MPS-488HP with Eight MM-10XPs
Current Draw
(Eight MM-10XPs)
115
V AC
230
V AC
100
V AC
Idle Current 0.74 A rms 0.54 A rms 0.81 A rms
Maximum Long-Term
Continuous Current
3.08 A rms 1.49 A rms 3.46 A rms
Burst Current 5.48 A rms 3.21 A rms 5.57 A rms
Ultimate Short-Term
Peak Current
9.56 A peak 4.96 A peak 10.28 A peak
Inrush Current 20.0 A peak 20.0 A peak 20.0 A peak