Miles Technology Multisonic M44, Руководство по эксплуатации

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3 Installation
20
a Multisonic array just like the front. Also the sides
can be set up the same way for very effective side
imaging. An M44 Imager is used for each sound
stage array.
System Interconnection
Grounding and Balanced Cable Connections
As with any signal processing equipment, the M86
should have its chassis grounded. Proper chassis
grounding will ensure both user safety and
maximum RFI protection. This is achieved by
plugging the line cord into a grounded outlet.
Pin 1 of each XLR connector is connected to
chassis ground to ensure correct cable shield
grounding.
Other interconnected equipment should be
grounded similarly to limit the common-mode
voltages appearing at balanced inputs. If the signal
source or load is grounded far away or on a
different branch circuit then isolation transformers
may be needed.
Here is the connector arrangement on the M44 and
M86:
XLR Input or Output Connection
pin 1: chassis ground
pin 2:
pin 3: signal -
RCA Input Connection
tip:
shield: signal -/chassis ground
It’s best if all interconnects include complete shield
connections. However there is some older audio
equipment which allows shield current through pin 1
to inject hum or noise into the system. This could
result in a ground loop hum when the shields are
connected. A quick solution to this is to use
telescoping shields to separate the grounds. In a
telescoping shield, each cable’s shield is left floating
(unconnected) at one end, usually the equipment-
output end, while the shield is connected to pin 1 at
the other end, usually the equipment-input end. This
prevents ground loops through the cable shields.
NEVER LIFT THE AC GROUND CONNECTION
ON ANY POWER CORD.
Unbalanced Connections
The M44 and M86 XLR inputs can accept either
balanced or unbalanced signals. Connect the signal
to pin 2 and - or ground to pin 3.
The outputs are symmetrical; if a single-ended
(“unbalanced”) output is needed, use pin 2 for +, pin
1 for ground, and leave pin 3 open. Do not ground
pin 3.
Since RCA (phono) connections are single-ended,
they are inherently susceptible to adding ground
noise to the signal. Therefore RCA cables should be
kept short to minimize noise pickup. It is also helpful
to use the same ac power circuit for equipment
interconnected with RCA connectors.
Basic System Interconnection
The signal interconnections to the M44 or M86 can
be arranged as shown in Figure 9.
For multi-way loudspeaker systems, each amplifier
channel is replaced with an amplifier group
preceded with a crossover. All three front (left,
center, and right) amplifier channels or groups
should have the same output capability.
It is essential to connect all signals with correct
polarity. Any polarity problem will be revealed during
the setup adjustment procedure and must be
corrected.
AC Line Power
The ac line cord includes a safety ground
connection. For electrical safety, be certain that the
unit is correctly grounded when plugged in.
The M44 or M86 may be left on indefinitely. Only a
small amount of power is used.
Be sure the power amplifiers are off before
switching the power to other equipment (including
the M86) on or off. The powering sequence is
important:
In general, when the audio system is turned on, the
power amplifiers should be the last components of a
system to turn on .
Conversely, when the audio system is turned off,
the power amplifiers should be the first components
to turn off .
The M44 and M86 can easily be set for either 120V
or 240V operation. Contact Miles Technology for
details.