Meyer Sound JM-1P - Manual (Page 9)

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CHAPTER 2: POWER REQUIREMENTS
The JM-1P loudspeaker combines advanced loudspeaker
technology with equally advanced power capabilities.
Understanding power distribution, voltage and current
requirements, as well as electrical safety issues, is critical to
the safe operation of the JM-1P.
AC POWER DISTRIBUTION
All components in an audio system (self-powered loud-
speakers, processors, etc.) must be properly connected to
an AC power distribution system, ensuring that AC line
polarity is preserved, and that all grounding points are con-
nected to a single node or common point using the same
cable gauge as the neutral and line cables.
NOTE: Improper grounding connections
between loudspeakers and the rest of the
audio system may produce noise or hum, or cause
serious damage to the input and output stages of the
system’s electronic components.
CAUTION: Before applying AC power to any
Meyer Sound self-powered loudspeaker, make
sure that the voltage potential difference between
neutral and earth ground is less than 5 V AC.
Figure 1 illustrates a basic three-phase AC distribution sys-
tem with the loudspeaker load distributed across the three
phases. All loudspeakers are connected to common neutral
and earth-ground points.
THE AC CONNECTORS
The user panel on the back of the JM-1P includes the fol-
lowing PowerCon
® AC connectors:
The AC Input Connector (Blue)
The blue AC Input connector supplies power to the JM-1P.
The connector is rated at 20 amps and uses a PowerCon AC
mains locking connector that prevents accidental discon-
nections. A 10-foot AC power cable, rated at 15 amps, is
included with each loudspeaker. If you replace the included
AC power cable, make sure to use a cable with the appropri-
ate power plug (on the other end) for the area in which you
will operate the unit.
The AC Input connector also supplies power to any addi-
tional loudspeakers connected to the loudspeaker’s gray
Loop Output connector. Each JM-1P loudspeaker requires
approximately 5 A rms (maximum long-term continuous
current) at 115 V AC for proper operation.
CAUTION: When using the included AC power
cable, do not loop more than two additional
JM-1P loudspeakers from the AC Loop Output con-
nector at 115 V (three total for the circuit), and not
more than five at 230 V (six total for the circuit).
The AC Loop Output Connector (Gray)
The gray AC Loop Output connector allows multiple JM-1P
loudspeakers to be looped and powered from a single
power source. Connect the AC Loop Output of the first
loudspeaker to the AC Input of the second, and so forth. The
AC Loop Output uses a PowerCon3 AC mains locking con-
nector that prevents accidental disconnections.
Figure 1: AC Power Distribution System
!
Line 1 Line 2 Line 3 Neutral
Earth Ground
JM-1P AC Input (left) and AC Loop Output (right) Connectors
!