MM-4XP : Self-Powered Miniature Loudspeaker

Features & Benefits •  Extremely compact enclosure • Self-powered •  Wide-range frequency response at ultralow distortion •  High speech intelligibility, and punch and bandwidth for music • Amazing SPL/size ratio • Enables runs of hundreds of feet of light-gauge cable

Applications •  Space-sensitive fill and spot coverage • Reinforcement invisibly concealed in steps and other hidden locations • High-quality distributed systems for paging and music • Small, portable systems for corporate AV

The MM-4XP miniature loudspeaker is a self-powered loudspeaker designed for high-quality distributed systems. Housed in a compact aluminum enclosure, the MM-4XP is especially suitable for installations involving space limitations and visibility concerns, such as fill and spot coverage, and hidden locations like chancel steps in a house of worship. 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 fixed applications, theatrical presentations (stage lip frontfill), and small portable systems for corporate AV solutions.

The MM-4XP meets the same exceptional performance standards established by its predecessor, the MM-4, and adds the advantages of self-powered systems, with onboard amplification and signal processing. The MM-4XP's proprietary 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-4XP exhibits the same high intelligibility and flat frequency and phase responses for which Meyer Sound loudspeakers are known. Peak and rms limiters regulate loudspeaker temperatures and excursion, ensuring that the MM-4XP performs exceedingly well even when driven into overload.

The MM-4XP'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-4XP receives balanced audio and DC power from a SwitchCraft EN3 connector on its rear panel. The sealed, 5-pin EN3 connector provides protection against harsh environmental conditions when the MM-4XP is installed outdoors.

MM-4XP loudspeaker systems require an MPS-488 external power supply. The single-space 19-inch rack unit receives eight channels of balanced audio from its XLR female inputs and routes the audio, along with 48 V of DC power, to its eight channel outputs. The MPS-488 channel outputs, equipped with either 5-pin Phoenix connectors or 5-pin EN3 connectors, can deliver DC power to the MM-4XP loudspeakers at cable lengths of up to 300 feet with just 1 dB of loss in peak SPL using 18 AWG wire. The use of composite multi-conductor cables (such as Belden 1502) allows a single cable to carry both audio and DC power to the MM-4XP. Longer cable lengths are possible for moderate applications that don't drive the loudspeakers to maximum output, or for instal- lations with heavier wire gauges. Powering the MM-4XP from a unipolar external power source reduces induced noise significantly and eliminates the need for wiring conduits.

The MM-4XP'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. It can also be custom painted to match specific color schemes. The MUB-MM4XP U-bracket is available for mounting the loudspeaker on walls and ceilings at adjustable angles.

ALLEN&HEATH have been innovating and creating audio systems for studio, live sound and DSP systems for 35 years. All of our expertise and knowledge (recording, studio, broadcast, live sound, pre/post production, club and installation) has been transferred into our DSP systems. The result of which is an extremely flexible system with no compromises in audio quality and performance.