3
Introduction
The MSL-6, Meyer Sound’s largest self-powered speaker,
is ideally suited for large-scale vocal public address
applications as a stand-alone system, and for musical
sound reinforcement in combination with Meyer self-
powered subwoofers and/or the DS-2P mid-bass speaker.
The MSL-6 features a 25
°
vertical coverage angle,
permitting long-throw arrays with up to three vertical
rows with minimal overlap between coverage areas.
The center and outer high frequency horns utilize
separate amplifier and control electronics to achieve a
30
°
horizontal coverage angle for a single MSL-6. Tight-
packing two units together yields a 60
°
coverage angle.
Since the MSL-6 is intended for tight-packing only, array
design is simple and modular: each additional unit
increases the horizontal coverage by 30
°
. The maximum
horizontal array size is twelve units, resulting in a
circular array with 360
°
coverage.
The MSL-6 contains amplifier and control electronics
for two 12” low frequency cone drivers and three high
frequency horn drivers (2” throat, 4” diaphragm) in a
compact trapezoidal cabinet. Each 12” driver is inde-
pendently amplified and contained in a horn-loaded
vented enclosure. This integrated design improves
performance, durability, and reliability, eliminates
amplifier racks, and simplifies setup and installation.
The MSL-6 can be equipped to operate with the Remote
Monitoring System
(RMS™) network and software
application. RMS displays signal and power levels, driver
and cooling fan status, limiter activity, and amplifier
temperature for all speakers in the network on a Windows-
based PC. Contact Meyer Sound for more information
about RMS.
AC Power
When AC power is applied to the MSL-6, the Intelligent
AC
™ supply automatically selects the correct operating
voltage, allowing the MSL-6 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 deference mode radio
frequencies (EMI)
• sustains operation during low voltage periods
• provides soft-start power-up, which eliminates
high inrush current
The MSL-6 can withstand continuous voltages up to
275 V and allows any combination of voltage to GND
(i.e. Neutral-Hot-GND, Hot-Hot-GND). Continuous
voltages higher than 275 V may damage the unit.
The MSL-6 uses a NEMA L6-20P or IEC 309 male power
inlet and satisfies UL, CSA, and EC safety standards.
Voltage Requirements
The MSL-6 operates safely and without audio disconti-
nuity if the AC voltage stays within either of two operating
windows: 85–134 V or 165–264 V, at 50 or 60 Hz. After
applying AC power, the proper operating voltage is
automatically selected, but the system is muted. During
the next three seconds, the primary fans turn on, the
main power supply slowly ramps on, the green Active
LED on the user panel illuminates, and the system is
enabled to pass audio signals.
TROUBLESHOOTING NOTE:
If the Active LED does
not illuminate or the system does not respond to audio
input after ten seconds, remove AC power. Electronics
technicians with access to a test bench can contact
Meyer Sound to receive
The Meyer Sound Self-Powered
Series MP-2 and MP-4 Field Verification Procedure
(part # 17.022.066.01). This service document contains
a series of tests to verify that the power supply and
amplifier are functioning properly. Other users should
contact Meyer Sound or an authorized service center.
