AYRE QB-9DSD - Manual (Page 11)

Controls and
Operation
There are no controls on the front panel of the
QB-9
DSD USB D/A converter. Instead the unit is
controlled by your computer via the USB
connection.
Display
The display has a green “Standby” LED that
indicates that the unit is connected to AC power.
When in standby mode, all critical internal
circuitry remains powered. This ensures optimal
sound quality with a minimum of warm-up time.
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