Operating Instructions — MM-4XP
Miniature Loudspeaker
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. The loudspeaker’s proprietary 4-inch cone transducer, manufactured at Meyer Sound's Berkeley factory delivers a linear peak SPL of 111.5 dB with crest factor > 16.5 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.
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MM-4XP Loudspeaker
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™ 5-pin male connector on its rear panel.
MM-4XP loudspeaker systems require a Meyer Sound external power supply (see meyersound.com/product/mps for more information). The MPS-488HP 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 outputs—equipped with either Phoenix 5-pin male connectors on the MPS-488HPP model, or EN3 5-pin female connectors on the MPS-488HPE model—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 multiconductor 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 installations with heavier wire gauges. The smaller MPS-482HP provides two channel outputs via 5-pin male Phoenix connectors.
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MPS-488HPP Power Supply
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-MM-4XP U-bracket mounts the loudspeaker on walls and ceilings at adjustable angles. The U-bracket is also available in standard white or black anodized finishes and custom colors.
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MM-4XP Loudspeaker Mounted with MUB-MM-4XP U-Bracket