Architectural Specification — MM-4XP
Directional Miniature Loudspeaker
The loudspeaker shall be self-powered and include a single 4-inch (103 mm) diameter cone transducer with a 4 Ω, long-excursion voice coil.
The loudspeaker shall incorporate a class‑D power amplifier with a burst capability of 220 W total (440 W peak) into a nominal load of 4 Ω. Distortion (THD, IM, TIM) shall not exceed 0.02 percent.
Performance specifications for a typical production unit shall be as follows: operating frequency range shall be 120 Hz–18 kHz; phase response shall be 400 Hz–20 kHz ±45°; linear peak SPL shall be 111.5 dB with crest factor > 16.5 dB, measured with M‑noise, free field at 4 m referred to 1 m; coverage shall be 80° horizontal and 80° vertical at 3–14 kHz ±10°.
Horizontal and vertical coverage shall be hypercardioid with a 10 Ω dB front‑to‑back ratio up to 500 Hz, 120° at 500 Hz to 4 kHz, and 80° at 4 kHz to 10 kHz ±10°.
The loudspeaker shall be equipped with a single SwitchCraft EN3 5‑pin connector (two pins for DC power, three pins for balanced audio). The audio input shall be electronically balanced with a 10 kΩ impedance and accept a nominal –2.5 dBV (0.75 V rms) input signal.
The approved power source shall be a Meyer Sound 48 V DC multi‑channel power supply model.
Loudspeaker components shall be housed in a sealed, extruded aluminum enclosure with a black anodized finish.
Dimensions with grille frame shall be W: 4.04 inch (103 mm) x H: 4.04 inch (103 mm) x D: 5.72 inch (145 mm).
Weight shall be 4.2 lb (1.9 kg).
On each side of the enclosure, 3/8‑inch – 16 inserts shall accommodate Meyer Sound mounting and rigging options.
The loudspeaker shall be the Meyer Sound MM‑4XP.