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■
When Link switches 1 and 3 are on and Link switch 2 is
off, Channel Input 1 is routed to Channel Outputs 1–2,
and Channel Input 3 is routed to Channel Outputs 3–4.
Channel Inputs 2 and 4 are inactive.
X
X
X
X
1
2
3
4
Common Routing Examples
Table 1 lists some of the more common routing applications
for the MPS-488 Link switches.
Table 1: MPS-488 Routing Examples
Routing
Link
Link
Application
1
INs 1–8 to
Off
OUTs 1–8
IN 1 to OUTs 1–4,
On
IN 5 to OUTs 5–8
IN 1 to OUTs 1–2,
On
IN 3 to OUTs 3–4,
IN 5 to OUTs 5–6,
IN 7 to OUTs 7–8
IN 1 to OUTs 1–8
On
Input Impedance for Linked Channel Inputs
When a Link switch is enabled, the Channel Input's unbuf-
fered source signal is transmitted in parallel to each linked
Channel Output. This causes the Channel Input's imped-
ance (normally 10 kOhms for one MM-4XP) to be reduced
for each linked Channel 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
1
1
Link
Link
Link
Link
2
3
4
5
Off
Off
Off
Off
On
On
Off
On
Off
On
Off
On
On
On
On
On
To avoid distortion when linking Channel Inputs, make sure
the source device can drive the total load impedance of the
linked MM-4XP loudspeakers. The source device must be
capable of delivering a minimum of 16 dBV (6.3 V rms into
600 ohms) to yield the maximum peak SPL over the operat-
ing bandwidth of the loudspeaker.
NOTE:
driving loads no smaller than 10 times their
output impedance. To drive eight MM-4XPs linked
from a single Channel Input, the source device should
3
3
have an output impedance of approximately
100 ohms or less.
For large loudspeaker systems with many loudspeakers, a
loudspeaker management system like Meyer Sound's
Galileo
®
is recommended. Galileo audio outputs can drive
two MPS-488 power supplies with all Channel Outputs
linked (a total of 16 MM-4XP loudspeakers). Therefore, a
Link
6
7
single Galileo with 16 audio outputs can drive 32 MPS-488
power supplies and 256 MM-4XP loudspeakers.
Off
Off
On
On
Galileo Loudspeaker Management System
Meyer Sound's Galileo loudspeaker management system is
Off
On
a comprehensive solution for driving and aligning loud-
speaker systems, especially those comprised of Meyer
Sound self-powered loudspeakers. The Galileo 616 is a two-
space rack unit with six inputs and 16 low-latency outputs.
On
On
Processing for the outputs includes gain, polarity, delay,
high- and low-pass filters, equalization (parametric and
TruShaping), and atmospheric correction.
Galileo 616
The Galileo 616 can be controlled from its intuitive front
panel or from the extensive Compass™ software running on
a Windows or Mac
interfaces seamlessly with Meyer Sound's SIM
analyzer.
MM-4XP OPERATING INSTRUCTIONS
Most source devices are capable of
®
computer. The Galileo system also
®
3 audio
11
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