Meyer Sound MM-4XPD
Directional Miniature Self-Powered Loudspeaker
The MM-4XPD directional miniature self-powered loudspeaker meets similar performance standards as the MM-4XP, with the added advantage of a directional hypercardioid pattern. The MM-4XPD patent pending technology achieves a high degree of attenuation between the front and the back of the loudspeaker and passively achieves a directional polar response.
Even at low frequencies this breakthrough technology achieves attenuation in the
order of 10 dB on the back of the loudspeaker. At higher frequencies the
loudspeaker retains directionality. All of this is achieved with a single driver
and avoids the complexity and cost associated with a second driver and dedicated
amplification and signal processing.
The MM-4XPD directional loudspeaker
was specifically designed for high-quality distributed systems in highly
reverberant spaces. The directional polar pattern of the loudspeaker at low
frequencies significantly reduces the excitation of the room and increases the
intelligibility of the system.
The single 4-inch cone transducer,
manufactured at Meyer Sound's Berkeley factory, delivers an impressive maximum
peak SPL of 113 dB, and has a wide operating frequency range of 120 Hz to 18 kHz
with very low distortion. The MM-4XPD exhibits the same high intelligibility and
flat frequency and phase responses for which Meyer Sound loudspeakers are
Its flexible and easy-to-configure mounting options, as well as
its ability to effortlessly reproduce both speech and music, make it an
excellent choice for large distributed applications as well as theatrical
presentations, and small portable systems for corporate AV solutions where
intelligibility is critical.
The MM-4XPD's amplifier and signal-
processing circuits are designed to store DC power and tolerate voltage drops,
thereby accommodating light-gauge cables and long cable runs. The MM-4XPD
receives balanced audio and DC power from a SwitchCraft EN3 connector on its
MM-4XPD loudspeaker systems require an external MPS Power
Supply. The MPS-488 rackmount 8-channel power supply is ideal for larger
installations with multiple loudspeakers and distributes power and audio signal,
while the compact MPS-481 is designed for powering single loudspeakers
The MM-4XPD's extruded aluminum enclosure acts as a heat
sink to dissipate heat from the driver's voice coil. The enclosure is available
in standard white or black anodized finishes with a perforated steel grille. The
MUB-MM4XP U-bracket is available for mounting the loudspeaker on walls and
ceilings at adjustable angles.