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User's Manual
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Banana
SpadeBare Wire
Dual-Banana
Rear Panel Features
Rear
Panel
4. XLR Inputs
If your preamplifier has XLR outputs,
connect them to the XLR inputs.
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 Sunfire amplifier.
5. Current Source Outputs and
6. Voltage Source Outputs
The left and right channels have two sets
of outputs. The voltage source output has a
source impedance of approximately zero
ohms. The current source has a source
impedance of approximately one ohm.
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.
According to your 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-
ment with other wiring options.
NOTE: The current source output is a
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 “Slow-Blow” type and current rating.
Note: Always unplug the power
cord from your AC outlet before
removing the fuse cover.