The MPS‑488HP IntelligentDC power supply delivers power and
balanced audio to up to eight Meyer Sound loudspeakers that
require an external DC power supply. Housed in a 1RU, standard
19-inch rack mount enclosure, the MPS‑488HP can be used with
a number of products that feature IntelligentDC technology, such
as the MM‑4XP miniature loudspeaker, the MM‑10XP miniature
subwoofer, or the HMS‑10 surround loudspeaker.
Meyer Sound's externally powered loudspeakers are equipped
with onboard amplification and signal-processing circuits that
store DC power and tolerate voltage drops (up to 30 percent),
thereby accommodating light-gauge cables and lengthy cable
runs. Powering loudspeakers from an external source eliminates
the need for wiring conduits while still preserving the advantages
of self-powered systems.
The MPS‑488HP receives eight channels of balanced audio from
its XLR female input connectors and routes the audio, along with
DC power, to its eight output connectors. Input channels feature
toggle switches that route inputs to corresponding channel
outputs only, or to adjacent, contiguous channel outputs. For
example, channel input 1 can be routed to channel outputs 1 and
2 and channel input 3 can be routed to channel outputs 3 and 4.
Another example is to route channel input 1 to channel outputs
1–4 and channel input 5 to channel outputs 5–8.
The MPS‑488HP's eight channel outputs are equipped with
current limiting that protects each channel from short circuits and
unexpected voltages. The power supply's outputs are available as
either Phoenix 5-pin male connectors on the MPS‑488HPp model,
or SwitchCraft® EN3 5-pin female connectors on the MPS‑488HPe
model. Outputs can deliver DC power to loudspeakers at cable
lengths up to 150 feet or 300 feet (depending on the loudspeaker
model) 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
from the MPS‑488HP to the loudspeakers. Longer cable lengths
are possible for moderate applications that do not drive the
loudspeakers to maximum output, as well as for installations with
heavier gauge wires.
The unit's front panel has two LEDs per channel output that
provide useful feedback on the status of the system. The blue
voltage LEDs indicate when voltage is present for each channel
output. The green load current LEDs indicate when a loudspeaker
is connected to a channel output, glow brighter as the signal level
increases, and blink when a short circuit is encountered.
The RMS™ remote monitoring system module is available as
a factory-installed option. It reports the voltage and current
readings for each output channel from a host computer running
Compass® Control Software via an RMServer™ hardware unit
(sold separately)