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CHAPTER 1
The Meyer Sound MJF-212A is a self-powered stage
monitor designed to meet critical monitoring requirements
in professional applications. Exhibiting flat amplitude
and phase responses and exceptional impulse response,
the MJF-212A meets and exceeds the capabilities of
conventional stage monitors while offering the simplicity of
setup and operation provided by self-powered systems.
The MJF-212A monitor’s phase-corrected frequency range
of 55 Hz to 18 kHz enables accurate reproduction of both
vocals and instruments with high gain before feedback, and
provides excellent intelligibility at high output levels with
low distortion and no coloration added to the signal. The
MJF-212A is engineered to have exceptional low-frequency
headroom, which can be helpful in some applications such
as the extreme low-frequency demands of high-level drum
monitoring. The face of the low-profile cabinet slopes at
40 degrees from the stage to permit optimal placement
relative to the talent, while its medium-Q horn provides even
coverage in both the horizontal and vertical planes.
Figure 1.1. MJF-212A high-power stage monitor
The MJF-212A is ideal for high-power monitoring with a
very low profile for applications that require clear sight lines.
With its self-powered advantage, the MJF-212A is equally
suited to touring, rental, and fixed installation applications.
High power, low profile, and ease of use make it an out-
standing performer in large to medium concerts, as well
as corporate AV applications and clubs. The MJF-212A
produces a peak output of 139 dB SPL with exceptionally
flat phase and frequency response.
The cabinet is constructed from premium birch plywood
and coated with a durable, textured black finish. It is
available in custom color finishes, allowing it to blend in
with any environment. A metal grille lined with acoustical
black mesh protects the drivers. The rugged MJF-212A
includes plastic skids on the bottom of the unit to prevent
damage to the enclosure or stage floor.
ADVANCED mJf-212A DRIVER TECHNOlOGy
The MJF-212A monitor and its high-powered drivers were
designed and manufactured at Meyer Sound’s factory in
Berkeley, California.
The low-frequency section features two high-power, 12-inch
cone drivers with 4-inch voice coils that easily meet the
power requirements of the system. The proprietary drivers
employ neodymium magnets for higher efficiency and
power handling with reduced weight. The lowest frequency
range is reproduced by these high-power drivers mounted
in an optimally vented enclosure, working in tandem, and
each powered by a dedicated amplifier channel.
The high-frequency section uses a 1.5-inch exit, 4-inch
diaphragm compression driver with a neodymium magnet,
also powered by a dedicated amplifier channel. The
output of the driver is coupled to a symmetrical 50-degree
constant-directivity horn, which allows the performer to
experience full bandwidth sound at generous distances
from the monitor.
40°
5'-10"
2'
8'
12'
50°
Figure 1.2. MJF-212A coverage, with the performer at 2, 8, and 12 feet from
the monitor
CHAPTER 1: INTRODUCING THE mJf-212A HIGH-POwER STAGE mONITOR