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Volume and Muting
The large knob on the C 1 front panel normally controls volume. However, when you press
the front-panel SOURCE or SURROUND buttons, it will control those functions for the next
5 seconds, or for as long as you keep using the knob to change those functions’ settings.
The C 1 Controller’s volume can be adjusted over a 106-dB range (–90 dB to +15 dB). Once the
C 1 has been calibrated for your listening room, amplifiers, and speakers, the sound reaching
you when the volume is set at 0 dB will be just about the same level you’d hear in a THX-cali-
brated commercial movie theater. The volume setting is shown numerically on the C 1 front-
panel display and, briefly, on the on-screen display (OSD); the OSD also shows a bar with an
indicator at 0 dB and another at the current level. When the volume setting reaches either end
of its range, the knob will still turn freely but the sound level will not change further.
When you turn the C 1 Controller on, the volume will normally be whatever level you had last
selected. However, to avoid sudden blasts of sound when turning the C 1 on again after a loud
listening session, the volume at turn-on is never higher than a moderate –20 dB.
Pressing the MUTE button on the left side of the front panel or on either remote will shut off all
sound until you either press MUTE again or raise the volume setting.
Plugging headphones into the jack at the left on the C 1 front panel will shut off output to the
rear-panel outputs except for the Rec/Out, Zone, and Record jacks, and “PHON” will appear
with the volume level indicator in the front-panel display screen and OSD. (The on-screen
display will also turn on briefly when the headset is plugged in or unplugged.) Volume in head-
phone mode is controlled by the regular volume knob; the available volume level may be limited
if your headphones have unusually low impedance.
Off On
Volume +
Mute
Volume –
Thumbpad
Off
Volume +
Volume –
On
Mute
USING THE MAIN CONTROLS continued
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