DLC-250.4 LOUDSPEAKER CONTROLLER
18
Connections
6. Connections
THEORY DLC amplifier rear panel connections are illustrated in
Diagram 6a.
6.1 Mains Power Connection
THEORY DLC amplifiers incorporate a power factor corrected universal
power supply and can be used with mains input voltage from 100V AC to
240V AC, 50/60Hz. Use the mains cable supplied with the amplifier.
THEORY DLC amplifiers have no mains power switch and are operational
as soon as mains power is connected.
Ensure that all signal, GPIO
and output connections are made before connecting the
amplifier to mains power.
6.2 Input Connection
All THEORY DLC amplifier models provide four balanced or unbalanced
analog audio inputs and a stereo S/PDIF digital audio input. Any input
channel can be routed to any output channel. Input routing options can be
configured via the amplifier network interface. See
Section 5
of this manual.
Analog Inputs
THEORY DLC analog inputs are of line level format with a
default input sensitivity of +4dBu (full output voltage swing/
sensitivity) in all output modes. Input signal levels up to +24dBu
can be handled without input clipping. Input sensitivity options
can be set via the amplifier network interface. See
Section 5
of
this manual.
Diagram 6a
THEORY DLC rear panel connections.
Note: Two output amplifier model connection sockets differ only in the deletion of channel 3 and channel 4 output connectors.
Balanced input connections to the amplifiers are made via male ‘Euro Block’
connectors. Connecting cables to the supplied female input connectors is
illustrated in
Diagram 6b.
Unbalanced input connections to the amplifiers are made via RCA phono
sockets connected in parallel with the balanced inputs.
Digital Inputs
THEORY DLC amplifier S/PDIF stereo digital audio input connections are
made via a single RCA Phono socket. The S/PDIF input is connected by
default to amplifier installation Zones A (left) and B (right).
Digital Outputs
THEORY DLC amplifier S/PDIF stereo digital audio output connections are
made via a single RCA Phono socket. The S/PDIF output signal by default
reflects the input to amplifier installation Zones A and B and is intended to be
used for daisy-chaining THEORY DLC amplifier.
Note: 75Ω RCA Phono cables specifically intended for digital audio
should always be used for S/PDIF connections. Standard Phono
cables can be used but may not result in optimal performance.
Note: The S/PDIF output level is by default set at -10dB to reduce
the possibility of downstream input clipping.
6.3 Output Connections
Output connections from the amplifiers are achieved via male ‘Euro Block’
connectors. Ensure that speaker connection polarity is correct throughout
the installation:
