Chapter 2: Power Requirements; Ac Power Distribution; The Ac Connectors - Meyer Sound UPQ-1P Operating Instructions Manual

CHAPTER 2: POWER REQUIREMENTS

The UPQ-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 UPQ-1P loudspeaker.

AC POWER DISTRIBUTION

All components in an audio system (self-powered loud-
speakers, mixing consoles, and processors) must be prop-
erly connected to the AC power distribution, ensuring that
AC line polarity is preserved, and that all grounding points
are connected 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.
Figure 1: AC Power Distribution System

THE AC CONNECTORS

The user panel on the back of the UPQ-1P loudspeaker
includes the following AC connectors:
UPQ-1P AC Input (left) and AC Loop Output (right) Connectors
The AC Input Connector (Blue)
The blue AC Input connector supplies power to the UPQ-1P
loudspeaker. The connector is rated at 20 amps and uses a
PowerCon3 AC mains locking connector that prevents acci-
dental disconnections. 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 appropriate 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 UPQ-1P loudspeaker requires
approximately 5 A rms maximum at 115 V AC for proper
operation.
CAUTION: When using the included AC power
cable, do not loop more than two additional
UPQ loudspeakers from the AC Loop Output connec-
tor at 115 V (three total for the circuit), and not more
than six at 230 V (seven total for the circuit).
The AC Loop Output Connector (Gray)
The gray AC Loop Output connector allows multiple UPQ
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.
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