Sunfire cinema grand Series II User Manual page 13

4. 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 positive (hot)
Pin 3 is negative (cold)
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.
5. Current Source Outputs and
6. Voltage Source Outputs
The front left, front right, and center
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.
The top post of each pair is the positive
output, and connects to the positive (red) post
of your speaker. The bottom post of each pair
is the negative, and connects to the negative
(black) post of your speaker. The posts can
accept bare wire, spade terminals, and dual
or single banana connectors.
+
Bare Wire
+ -
+ -
Dual-Banana
+
-
Spade
Banana
According to your musical taste, you may
select the current source for electrostatic,
planar magnetic or ribbon speakers. Select
the voltage source for subwoofers. For cone
based systems, use either. For a biwired
system, use the current source for midrange
and treble drivers and use the voltage source
for the subwoofer(s). These are suggestions
only. By all means, please feel free to experi-
Rear
ment with other wiring options.
Panel
NOTE: The current source output is a
View
voltage source modified to yield a current
source impedance of one ohm. This corre-
sponds approximately to a vacuum tube
amplifier output impedance and constitutes
the dominant factor in the soundstage delivery
of classic vacuum tube power amplifiers.
7. Current Source Fuses
Each current source output has an in-line
fuse to protect your speakers. If one ever
opens, there will be no output to that speaker.
8. IEC connector
The amplifier comes with a detachable
Linecord which attaches here. Make sure it is
firmly pushed in place. Connect the other end
to an AC outlet which is properly configured
for the type of plug and has the correct
voltage for your model.
9. Line fuse
If this fuse fails, replace it with the exact
same type and current rating.
Note: Always unplug the power
cord from your AC outlet before
removing the fuse.
With a flat ended screwdriver, push the
fuse carrier in slightly and turn it counter-
-
clockwise to release.
Rear Panel Features
User's Manual
13