Front Panel Controls - Audio Research Reference 10 User Manual

11
Operation

Front Panel Controls

The Reference 10 has one microprocessor-driven rotary control and two
buttons (Power and Mute).
Rotary control: Adjusts Volume (output level) up or down for both L and R
channels, and adjusts the balance when the balance function is selected
on the main screen. Volume control is also selectable via Vol UP and Vol
DN buttons on the remote control. Volume adjustment is indicated in the
display window by numeric digits on 0–103 scale.
Do not turn volume up beyond normal listening levels when 'mute' is
engaged to avoid unexpected or possibly damaging sound levels. Reduce
volume level whenever changing input sources, even when muted.
Power On/Off: (left button beneath rotary control) Supplies power from
A.C. wall outlet to preamp; indicated by active display window.
The Reference 10 requires approximately 40 seconds to warm up; this time
is required to stabilize the power supply. See 'Power-Up Procedure' on
the adjacent page for details. The same cycle also occurs in the event of a
power interruption.
Mute: (right button beneath rotary control) When activated, electrically
mutes all output of the preamplifier; indicated by 'Mute' in display window.
This control should be activated before switching inputs, changing
connections or shutting down your audio system to help protect your
amplifier and speakers from unexpected signal pulses. When deactivated,
'Mute' disappears from the display window allowing normal operation.
The Reference 10 also has automatic muting to help protect system
components during A.C. power interruptions or low line voltage. When
sensing these conditions, the preamp automatically goes into 'Mute' and
disables all outputs. The 40-second warm-up timer will restart and 'Mute'
will flash in the display window when normal power conditions have been
restored.
Note that automatic muting is only designed to protect against power line
interruptions or severe voltage drop. It will not mute in the event of subsonic
transmissions from a faulty input source, amplifier failure or speaker
malfunction.
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