Meyer Sound MPS-488HP Operating Instructions Manual page 10

CHAPTER 2: MPS-488HP FRONT AND REAR PANELS
Input Impedance for Linked Channel Inputs
When a Link switch is enabled, the channel input's unbuff-
ered source signal is transmitted in parallel to each linked
channel output. This causes the channel input's impedance
(normally 10 kOhms for one loudspeaker) to be reduced for
each linked output. For example:
1 channel output, 10 kOhm input impedance
■
2 channel outputs, 5 kOhm input impedance
■
4 channel outputs, 2500 ohms input impedance
■
8 channel outputs, 1250 ohms input impedance
■
To avoid distortion when linking channel inputs, make sure
the source device can drive the total load impedance of the
linked loudspeakers. The audio source must be capable of
producing +16 dBV (6.3 V rms, 9 V peak) into 600 ohms to
produce the maximum peak SPL over the operating band-
width of the loudspeaker.
NOTE: Most source devices are capable of
driving loads no smaller than 10 times their
output impedance. To drive eight loudspeakers linked
from a single channel input, the source device should
have an output impedance of approximately
100 ohms or less.
Channel Outputs
The MPS-488HP's eight channel outputs deliver DC power
(48 V DC) and balanced audio to up to eight loudspeakers.
The channel outputs are available as either Phoenix 5-pin
male connectors (on the MPS-488HP
female connectors (on the MPS-488HP
NOTE: For information on cable requirements
for your loudspeaker, refer to its operating
instructions. For information on cables and cable
accessories available from Meyer Sound, see
Appendix A, "MPS-488HP Accessories."
TIP: A single composite cable (such as Belden
1502 or equivalent) wired for both DC power
and balanced audio can be used to connect loud-
speakers to channel outputs.
10
model) or EN3 5-pin
P
model).
E
CAUTION: Make sure loudspeaker cables are
wired correctly. For details on assembling loud-
speaker cables, refer to Appendix B, "Assembling
Loudspeaker Cables."
NOTE: HMS-15 loudspeakers require power
from two contiguous channels of the
MPS-488HP. If audio signal is present on both chan-
nels connected to an HMS-15, the signal is summed
internally.
MPS-488HP Channel Outputs
P
The MPS-488HP channel outputs are Phoenix 5-pin male
P
connectors with three pins for balanced audio (positive, neg-
ative, and shield) and two pins for DC Power (positive and
negative). The pins are clearly labeled on the MPS-488HP
rear panel.
MPS-488HP Channel Outputs
P
Each MPS-488HP comes with eight Phoenix 5-pin female
P
cable connectors for assembling loudspeaker cables.
MPS-488HP Channel Outputs
E
The MPS-488HP channel outputs are EN3 5-pin female
E
connectors with three pins for balanced audio (positive,
negative, and shield) and two pins for DC Power (positive
and negative). The pins are clearly labeled on the
MPS-488HP rear panel.
E
MPS-488HP Channel Outputs
E
Each MPS-488HP comes with eight EN3 5-pin male cable
E
connectors for assembling loudspeaker cables.
P