Ayre Acoustics V-1x Power Amplifier - Manual (Page 6)

Inputs
The input selector switch for
one channel will be in the
“up” position, while the other
channel’s input selector switch
will be in the “down”
position.
The power amplifier can be driven by a preamplifier or
directly from a source (tuner, CD player, etc.) that has a
level control. There are two sets of input connectors on the
rear panel of the Ayre V-1x. The RCA jacks accept signals
from unbalanced sources, while the XLR connectors are for
balanced sources. A small toggle switch near the input
connectors selects either the balanced or unbalanced inputs.
Using the incorrect position on
the input selector switches will
not harm the equipment, and
the amplifier may even seem to
operate normally. However,
some sonic degradation occurs
in this situation.
Selecting “Unbal” connects the inverting input to ground
through an isolation resistor. Therefore, the incorrect
setting of this switch forces a balanced source to operate in
unbalanced mode. Conversely, if the selector is set to “Bal”
while using an unbalanced source, the unused inverting
input is susceptible to hum pick-up and radio-frequency
interference.
Outputs
The heavy-duty output
terminals of the Ayre V-1x
are designed to work best with
spade lugs.
The Ayre V-1x drives the loudspeakers with balanced
outputs. Since none of the output terminals are grounded,
connecting any of them to ground may result in serious
damage to the amplifier.
Do not use any speaker switch-box, accessory,
or test equipment that has a common ground
connection for both channels.
There are two sets of output terminals per channel, making
it easier to bi-wire your speakers. These terminals are wired
in parallel, providing identical output signals.
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