AYRE VX-R - Manual (Page 4)

Input
The VX-R stereo power amplifier can be driven by a
preamplifier or directly from a line-level source (e.g., D/A
converter or CD player) that has a volume control.
A balanced input connector is provided to achieve the highest
sound quality. Should it be necessary to connect a single-ended
preamplifier or source component, high-quality adapters are
available from your Ayre dealer.
When you have a choice, a properly implemented balanced
connection will offer higher sound quality than a single-ended
connection.
Loudspeaker Outputs
The heavy-duty output terminals of the
Ayre VX-R work best with speaker cables
using spade lugs.
The Ayre VX-R drives the loudspeakers with balanced outputs.
Since neither of the loudspeaker output terminals are grounded,
connecting them to ground may damage the amplifier.
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