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Introduction
The 650-P, Meyer Sound’s most powerful self-powered
subwoofer, contains independent amplifier and control
electronics for two 18” drivers in a compact enclosure.
This integrated design improves performance, durability,
and reliability, eliminates amplifier racks, and simplifies
setup and installation.
The 650-P has the following acoustical specifications:
Frequency Response ±4 dB 28 100 Hz
Phase Response ±30° 45 145 Hz
Dynamic Range > 110 dB
See page 14 for complete specifications.
The 650-P is compatible with the Meyer MSL-4, CQ™
Series, and MTS-4 self-powered speakers and can be
used in any system requiring additional low frequency
reinforcement..
The 650-P 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. Contact Meyer Sound for
more information about RMS.
AC Power
When AC power is applied to the 650-P, the Intelligent
AC™ supply automatically selects the correct operating
voltage, allowing the 650-P to be used in the US, Eu-
rope, or Japan without manually setting a voltage switch.
The Intelligent AC power supply also protects the 650-
P by performing surge suppression for high voltage tran-
sients (up to 275V), minimizing inrush current, and
filtering EMI. The 650-P uses a NEMA L6-20P or IEC
309 male power inlet and satisfies UL, CSA, and EC
safety standards.
Continuous voltages above 275VAC may damage
the unit!
Voltage Requirements
The 650-P operates safely and without audio discon-
tinuity if the AC voltage stays within the ranges 85–
134V or 165–264V, at 50 or 60Hz. 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 650-P
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 650-P 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 650-P does not turn back on after
ten seconds, remove AC power and refer to the TROUBLE-
SHOOTING NOTE above.