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Connections
4
Make sure the external breaker is off before attempting
to make any input or output connections.
By using good quality input and output speaker cables,
the likelihood of erratic signal behavior is reduced to a
minimum. Whether you make them or buy them, look for
good quality wires, connectors and soldering techniques.
Coastal Source includes (2)pairs of RCA input cables
with each CRS amplifier for factory quality input connections.
Other input and output cables are available separately for
completely factory I/O connections.
4 : 1.Signal grounding
There is no ground switch or terminal on the CRS
amplifiers. All shield terminals of input connections are
directly connected to the chassis. This means that the unit’s
signal grounding system is automatic. In order to limit hum
and/or interference entering the signal path, use balanced
input connections.
In the interests of safety, the unit MUST always operate
with electrical safety earth connected to the chassis via the
dedicated Protective Earth wire.
4 : 2.Analog audio input connections
Analog input connections are made via the Phoenix MC
1,5/12-ST-3,81 1803675 connector. Signal polarity of analog
input connections is shown in Panel F, p. 6.
Short the Positive (+) and Negative (-) to the Ground
Input terminal on the unused Input channel(s) in order to
avoid picking up noise.
4 : 2.1. Remote level adjustment
The level of each channel of the CRS amplifiers can be
remotely adjusted by means of a linear 10 kΩ potentiometer
connected to the input LEVEL connector (see Panel D, p. 5)
through a Phoenix MC 1,5/12-ST-3,81 1803675 plug. The
right polarity for the connections is shown in Panel H, p. 6.
When the CH1 MSTR switch is in the OFF position (low)
the remote level potentiometers work independently on
each separate channel.
When the CH1 MSTR switch is in the ON position (high)
the remote level potentiometer of the channel 1 acts as a
master level, controlling the volume of all the four channels.
The remote level controls are in series with the level
adjustment knobs in the front panel.
4 : 3.Digital audio input connections
The CRS amplifiers accept four input streams from the
Dante connection through the Dante port. Cabling must
comply to TIA/EIA-568-B and adopt the T568B scheme
pinout, as shown in
Panel U, p. 9.
In order to implement a Dante network, a computer
running Dante Controller has to be used. Dante Controller
is a software application that manages devices on the
network. CRS amplifiers are automatically discovered and
displayed in Dante Controller with the default identifier
MODELNAME-SERIAL
(e.g. CRS2800-71520).
4 : 3.1. Input selection and Backup policy
With CRS amplifiers, it is possible to select among two
input signal sources per channel: analog and Dante streams.
The Armonía Pro Audio Suite software provides an interface to
select the proper input source, manage input gain and delay
of the analog and digital sources, in order to compensate
transmission latency and levels.
Furthermore, CRS amplifiers implement a backup policy
aimed to improve reliability against signal fault. By assigning
a bus priority to the two different input sources per channel,
the system is able to automatically switch to a reliable input
connection in case of signal drop or pilot tone mismatch.
4 : 4.Ethernet connections
The port labeled Ethernet is designed to remotely
control the amplifier via an Ethernet connection through a
personal computer and Armonía Pro Audio Suite software.
A complete interface for signal routing, sound shaping, and
performance fine tuning is provided.
Coastal Source recommend the use of Ethernet Cat5
straight through – patch – cables with pin/pair assignments
TIA/EIA-568-B, i.e. T568B, as shown in
Panel U, p. 9.
4 : 5.Output connections
WARNING: Connecting speakers to the incorrect channels
could cause permanent speaker damage and void all
warranty claims.
CLASS 3 WIRING
Output terminals are hazardous: wiring connection to
these terminals require installation by an instructed
person and the use of ready made leads. Take care to secure
the output terminal before switching the device on.
Output connections are made via the Phoenix
PC 5/ 8-STF1-7,62 1777891: single-ended wirings for lo-Z
loudspeaker and Hi-Z distributed lines connections are
shown in Panel K, p. 6. Bridge-tied connection of lo-Z
loudspeaker is supported on adjacent channel pairs 1-2,
3-4, 5-6 and 7-8; inputs must be physically paralleled as
shown in Panel L, p. 6.
Any mixed configuration of low and high impedance
output loads can be made: in order to set the load
configuration, each channel is provided by four DIP switches
(refer to Panel O, p. 7). CRS Amplifiers are configured to
drive Lo-Z loads by factory default.
4 : 5.1. Hi-Z 70V/100V operations
Any channel of a CRS amplifier can drive 70V/100V
(Hi-Z) distributed line of loudspeakers. In order to connect
any channel’s output to a 70V/100V line, the rear panel DIP
switch corresponding to the channel must be correctly set
as indicated in
Panel O, p. 7.
CLASS3CLASS3
WIRING
WIRING
14 | Component Rack System
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