Powering HMS Loudspeakers
MPS-488HP IntelligentDC High-power Eight-channel Power Supply
HMS loudspeakers require an external MPS-488HP IntelligentDC power supply. The single-space 19-inch rack unit distributes DC power and balanced audio to up to eight HMS-5, HMS-10, or HMS-12 loudspeakers, or up to four HMS-15 loudspeakers. Composite multiconductor cables, such as Belden 1502 or equivalent, can deliver both DC power and balanced audio to loudspeakers at cable lengths up to 150 feet with just 1 dB of loss in peak SPL using 18 AWG wire. Longer cable runs are possible with heavier gauge wires. Meyer Sound’s RMS remote monitoring system is optionally available for the MPS-488HP.
MPS-488HP IntelligentDC Power Supply
Caution
Disconnect the mains plug or power off the MPS-488HP before disconnecting its power cord.
Tip
For complete information on using the MPS-488HP IntelligentDC power supply, refer to the MPS-488HP Operating Instructions (PN 05.205.005.01) available at meyersound.com/documents.
Powering HMS Loudspeakers
Note
The MPS-488HP can power up to eight single-channel HMS loudspeakers (HMS-5, HMS-10, and HMS-12), or up to four dual-channel HMS-15 loudspeakers.
Power off the MPS-488HP.
Connect audio sources (from a mixer or processor) to the MPS-488HP channel inputs. Use balanced XLR cables.
Use the MPS-488HP Link switches to route channel inputs to the desired channel outputs. For information about the MPS-488HP Link switches, refer to the MPS-488HP Operating Instructions.
Connect HMS loudspeakers to the MPS-488HP channel outputs. Use composite cables (such as Belden1502 or equivalent) wired for both DC power and balanced audio and outfitted with the appropriate connectors.
To power single-channel HMS loudspeakers (HMS-5, HMS-10, and HMS-12), connect each loudspeaker to a single-channel output with a single composite cable. The MPS-488HP can power up to eight single-channel HMS loudspeakers.
MPS-488HP with Eight HMS-10 Loudspeakers
To power dual-channel HMS-15 loudspeakers, connect each loudspeaker to a channel output pair (1–2, 3–4, 5–6, or 7–8) with two separate composite cables. The MPS-488HP can power up to four dual-channel HMS-15 loudspeakers.
MPS-488HP with Four HMS-15 Loudspeakers
Caution
When powering HMS-15 loudspeakers, you must use two separate composite cables connected to an MPS-488HP channel output pair (1–2, 3–4, 5–6, or 7–8). Do not use a single cable to deliver power to the HMS-15’s two Input connectors. Never, in any manner, combine the signals from two MPS-488HP channel outputs, either at the power supply (source) or the loudspeaker (destination).
Make sure loudspeaker cables are wired correctly. For details on assembling loudspeaker cables, refer to Assembling Loudspeaker Cables.
Tip
You can use separate cables for HMS loudspeaker connections: a 2-conductor cable for DC power and a 3-conductor cable for balanced audio, both attached to a single Phoenix connector on each cable end. This allows you to use a larger gauge for the DC cable so you can achieve longer cable runs (see Long Cable Runs with Separate Cable for DC Power and Audio).
Power on the MPS-488HP and monitor the LEDs on the front panel to verify connections. For information about the MPS-488HP LEDs, refer to the MPS-488HP Operating Instructions.
Monitor the HMS loudspeaker LEDs to verify they are receiving power.
For single-channel HMS loudspeakers (HMS-5, HMS-10, and HMS-12), make sure the On/Status LED turns solid green after powering on the loudspeakers.
For dual-channel HMS-15 loudspeakers, make sure the two Input LEDs and On/Status LED turn solid green after powering on the loudspeakers.
Enable output from the audio sources (from the mixer or processor) connected to the MPS-488HP.