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It is essential that even the most carefully assembled sound
systems be analyzed with precise measurement tools. We
recommend using the Meyer Sound SIM® System II Sound
Analyzer1 and CP-10 Parametric Equalizer2 to
• assist the process of choosing and configuring speakers;
• measure propagation delays between subsystems to set the
correct polarity and delay times;
• measure and equalize variations in frequency response
caused by the acoustical environment and the placement
and interaction of speakers.
Contact Meyer Sound for assistance with your application.
We recommend using one of the Meyer Sound line drivers to
integrate different types of Meyer self-powered speakers into
a complete system. The LD-1A and LD-2 have two channels
equipped to control a full-range main system, and the LD-1A
has six auxiliary channels for down-fill, front-fill, and delay
systems. The LD-1A maintains signal integrity for long cable
paths and provides the following useful functions:
• The Lo Cut switch activates a high-pass filter (160 Hz, –12
dB/oct, Q = 0.8) that performs a crossover function for the
Mid-Hi output.
• The DS-2 & Sub Crossover switch (channels 1 and 2 only)
activates a crossover network optimized for the DS-2P or
DS-4P when used with the 650-P. With the switch in,
frequencies below 80 Hz are sent to the Sub output (for
the 650-P), and above 80 Hz to the DS-2 output. When
the 650-P is used without the DS-2P or DS-2P, the switch
should be out, which sends a full-range signal to both the
DS-2 and Sub outputs.
• The DS-2 f and Sub f switches (channels 1 and 2 only)
toggle the polarity for the DS-2 and Sub outputs.
• The Mid-Hi, DS-2, and Sub outputs (channels 1 and 2 only)
each have their own gain control and mute switch.
POLARITY NOTE: The polarity for Meyer Sound self-powered
speakers may be reversed using the input polarity switch on
the user panel. The line drivers also allows polarity reversal
with the DS-2 f and Sub f switches for speakers connected
to the DS-2 and Sub outputs. When making polarity decisions
in applications that include the LD-1A or the LD-2, check the
state of all polarity switches.
MEASUREMENT AND SYSTEM INTEGRATION TOOLS
COMPLETE SYSTEMS
MEYER SPEAKER TYPES
The following Meyer speakers are mentioned in the example
applications.
CQ Self-powered mid-hi speaker
PSW-4 Self-powered subwoofer
650-P Self-powered subwoofer
The Meyer self-powered speakers listed above have a loop
connection to send the input signal to another speaker.
Full-range signals can be applied to all Meyer self-powered
subwoofers because they have built-in active crossovers that
filter mid-hi frequencies.
MTS-4A AND PSW-4
Combining the PSW-4 with the MTS-4A doubles the low
frequency power of the system because both loudspeakers
contain the same sub and low drivers. Due to the summation
between the PSW-4 and the MTS-4A, the system frequency
response exhibits a rise in the range 30–160 Hz. It is
important to emphasize that the speakers are in phase in
this region. This rise can be corrected using the Meyer CP-10
Parametric Equalizer, if desired.
Set the MTS-4A and PSW-4 to the same polarity.
PSW-4
input
loop
MTS-4A
CP-10 EQ
(1 Channel)
The LD-1A/2 with an MTS-4A and PSW-4
1. The Meyer Sound SIM II is a computer-based dual channel FFT
analysis system optimized for electroacoustic measurement.
2. The CP-10 is a dual-channel, complimentary phase, precision analog
equalizer with five bands of parametric equalization and two bands
of shelving filters.