4
Introduction
The Meyer DS-2P self-powered mid-bass loudspeaker
is intended to supplement Meyer self-powered subwoofers
but can also be used as a stand-alone subwoofer. When
used with a Meyer subwoofer and crossover (such as
the Meyer LD-1A Line Driver), frequencies below 80 Hz
are sent to the subwoofer, and the mid-bass frequencies
are sent to the DS-2P, allowing each speaker to function
in its most efficient range. See page 8 for an overview of
the LD-1A; contact Meyer Sound for additional infor-
mation.
The DS-2P contains independent amplifier and control
electronics for two 15” cone drivers in a compact folded
horn enclosure. This integrated design improves perfor-
mance, durability, and reliability, eliminates amplifier
racks, and simplifies setup and installation.
The minimum configuration of two DS-2Ps have the
following acoustical specifications:
Frequency Response ±4 dB 50 – 160 Hz
Phase Response ±60° 60 – 200 Hz ¿¿
Dynamic Range > 120 dB
Coverage 120° H x 120° V
The DS-2P’s trapezoidal shape facilitates the creation of
speaker arrays that maximize the coverage area and SPL
for the size of the array. Rigging hardware is provided to
safely suspend the DS-2P in elevated installations.
The DS-2P can be equipped to operate with the Remote
Monitoring System (RMS) interface 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.
AC Power
When AC power is applied to the DS-2P, the Intelligent
AC™ supply automatically selects the correct operating
voltage, allowing the DS-2P to be used in the US, Europe,
or Japan without manually setting a voltage switch. The
Intelligent AC power supply also performs surge
suppression for high voltage transients (up to 275 V),
minimizes inrush current, and filters EMI. Continuous
voltages above 275 VAC may damage the unit! The DS-2P
uses a NEMA L6-20P or IEC 309 male power inlet and
satisfies UL, CSA, and EC safety standards.
Voltage Requirements
The DS-2P operates safely and without audio discon-
tinuity if the AC voltage stays within the ranges 85–
134 V or 165–264 V, at 50 or 60 Hz. Immediately after
applying AC power, the green Active LED on the user
panel illuminates and the proper operating voltage is
automatically selected, but the system is muted. During
the next three seconds, the primary fan turns on, the
main power supply slowly ramps on, 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 to avoid
possible damage to the unit. Experienced electronics
technicians with access to a test bench can verify proper
operation for the power supply and amplifier system with
The Meyer Sound Self-Powered Series MP-2 and MP-4
Field Verification Procedure
(part # 17.022.066.01;
contact Meyer Sound to receive this document). All other
users should contact Meyer Sound or an authorized
Meyer service center.
If the voltage decreases below the lower bound of either
operating range (known as a brown-out period), the
supply uses current from its storage circuits and continues
to function briefly. The unit turns off if the voltage does
not increase above the threshold before the storage
circuits are depleted. The length of time that the DS-2P
continues to operate during brown-out depends on how
low the voltage drops and the audio source level during
this period.
If the voltage fluctuates within either operating range,
automatic tap selection stabilizes the internal operating
voltage. This tap selection is instantaneous and there are
no audible artifacts. If the voltage increases above the
upper bound of either range, the power supply turns off
rapidly, preventing damage to the unit.
If the DS-2P shuts down due to either low or high voltage,
the power supply automatically turns on after three
seconds if the voltage has returned to either normal
operating range. If the DS-2P does not turn back on after
ten seconds, remove AC power and refer to the
TROUBLE-
SHOOTING NOTE
above.
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