CHAPTER 2: POWER REQUIREMENTS
14

WIRING FOR AC CONNECTIONS

MINA loudspeakers require a grounded outlet. To operate
safely and effectively, it is extremely important that the
entire system be properly grounded.
When wiring international or special-purpose power connec-
tors:
■Connect the blue wire to the black terminal, or the termi-
nal marked with an N.
■Connect the brown wire to the red terminal, or the termi-
nal marked with an L.
■Connect the yellow and green wire to the green (or green
and yellow) terminal, or the terminal marked with an E.
CAUTION: When creating AC power cables
and distribution systems, it is important to pre-
serve AC line polarity and connect the earth ground
on both ends of the cable. MINA requires a grounded
connection. Always use a grounded outlet and plug.
It is extremely important that the system be properly
grounded in order to operate safely and properly. Do
not ground-lift the AC cable.

AC POWER DISTRIBUTION

All components in an audio system (self-powered loud-
speakers, mixing consoles, and processors) must be prop-
erly connected to an AC power distribution system, 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 of 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 the
neutral and earth-ground lines 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 lines.
AC Cable Wiring Scheme
Blue = neutral
Brown = hot
Yell ow/ gr een =
earth ground
(chassis
!
Figure 1: AC Power Distribution System
!
Line 1 Line2 Line 3 Neutral
Earth Ground