Meyer Sound M1D - Manual (Page 9)

3
CHAPTER 1
Self-powered and ultra-compact, the M1D and M1D-Sub
loudspeakers represent advanced technology with equally
advanced power capabilities. Understanding power
distribution, voltage and current requirements, as well as
electrical safety issues, is critical to their safe operation
and deployment.
AC POWER
The M1D and M1D-Sub loudspeakers use a PowerCon®
3-pole AC mains system with locking connectors to
prevent accidental disconnection. Two female inlets (one
colored blue and the other gray) are provided. The blue
connector serves as the power input. To loop additional
units, simply attach a cable from the gray connector of
the first loudspeaker system to the blue connector of the
second, and so on (Figure 1.1).
Figure 1.1. You can daisy-chain M1D loudspeakers and/or M1D-Sub
subwoofers using the gray connector.
NOTE: A 10-foot blue power connector
cable is provided with the M1D and M1D-
Sub loudspeakers, as well as a gray loop out
connector. Additional looping cables are available
from Meyer Sound.
! CAUTION: Do not loop more than four
M1D/M1D-Sub cabinets from the loop out
connector when connected at 115 V and not more
than eight when driven at 230 V.
! CAUTION: Ensure that you select the
correct power plug for the AC power in
the area in which you use the M1D or M1D-Sub
loudspeaker.
When AC power is applied to the M1D and M1D-
Sub loudspeakers, the Intelligent AC power supply
automatically selects the correct operating voltage,
allowing the loudspeakers to be used internationally
without manually setting voltage switches. The Intelligent
AC supply performs the following protective functions to
compensate for hostile conditions on the AC mains:
 Suppresses high-voltage transients up to several
kilovolts
 Filters common mode and differential mode radio
frequencies (EMI)
 Sustains operation temporarily during low-voltage
periods
AC Power Distribution
All amplifier modules and directly associated audio
equipment (mixing consoles, processors, etc.) must
be connected to the AC power distribution in a proper
manner, preserving AC line polarity and connecting earth
ground such that all grounding points are connected to a
single node or common point using the same cable gauge
as the neutral and line(s) cable(s).
Improper grounding connections between loudspeakers
and the rest of the audio system may produce noise, hum
and/or serious damage to the input/output stages in the
system’s electronic equipment.
!
CAUTION: Before applying AC to any
Meyer Sound self-powered loudspeaker, be
sure that the voltage potential difference between
neutral and earth ground is less than 5 V AC.
The M1D and M1D-Sub loudspeakers can withstand
continuous voltages up to 264 V and allow any
combination of voltage to GND (that is neutral-line-ground
or line-line-ground).
! CAUTION: Continuous voltages higher than
264 V may damage the loudspeaker.
CHAPTER 1: POWER REQUIREMENTS
Blue Gray