Sunfire Series II - Manual (Page 8)

8
User's Manual
3. XLR Inputs
If your preamplifier has XLR outputs,
connect them to the XLR inputs. Use them
instead of the RCA inputs because balanced
connections offer superior noise rejection.
The female XLR inputs are wired as
follows:
Pin 1 is ground
Pin 2 is negative (cold)
Pin 3 is positive (hot)
Balanced connections
pass the input signal along
two conductors. If there is any external noise
and interference passing into the audio lines,
both conductors will receive the same amount
of noise. This noise is then rejected in the
balanced input stage of the Cinema Grand
Amplifier.
4. Current Source Outputs and
5. Voltage Source Outputs
The front left, front center and front right
channels have two sets of outputs. The
voltage source output has a source imped-
ance of approximately zero ohms. The current
source has a source impedance of approxi-
mately one ohm. The left rear and right rear
channels have voltage source outputs only.
Rear
Panel
View
Rear Panel Features
5 4 1 3 2
6 7 8
Rear Panel Features
1. AUTO/ON/OFF Switch
Your Cinema Grand Amplifier is
designed with an automatic on/off circuit.
• In the AUTO-ON position, the amplifier
will automatically turn on if an audio
signal is present at the left front or
center inputs. The amplifier will
automatically turn off after approxi-
mately 30 minutes absence of an
audio signal.
• In the POWER ON position, the
amplifier is always on.
• In the POWER OFF position, the
amplifier is always off.
2. RCA Inputs
Your Cinema Grand Amplifier has three
sets of inputs for each of the five channels.
Two are unbalanced RCA inputs and one is a
balanced XLR type.
The two RCA inputs for each channel are
joined together internally and either one can
be connected to the corresponding output of
your preamplifier. The other can be used as a
daisy-chaining output, sending the preampli-
fier output signal to another channel or to
another amplifier.