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CHAPTER 1: INTRODUCTION
8
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 outputs — equipped with either
Phoenix 5-pin male connectors on the MPS-488
P model, or
EN3 5-pin female connectors on the MPS-488
E 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 installa-
tions with heavier wire gauges.
The MPS-488 front panel has two LEDs per output channel
that provide useful feedback on the status of the system.
The Voltage LEDs indicate when voltage is present for each
output channel. The Load Current LEDs indicate when a
loudspeaker is connected to an output and glow brighter as
the signal level increases.
The MM-4XP’s extruded aluminum enclosure acts as a heat
sink to dissipate heat from the driver's voice coil. The enclo-
sure 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 mounts the loudspeaker on walls and ceilings at
adjustable angles. The U-bracket is also available in stan-
dard white or black anodized finishes and custom colors.
MPS-488P Power Supply
MM-4XP Loudspeaker Mounted with MUB-MM4XP U-Bracket