Onkyo TX-DS474 Instruction Manual page 18

Selecting a sound source
Speakers selector (SPEAKERS A, B)
SPEAKERS A: This button turns on or off the speakers connected
to the FRONT SPEAKERS A, CENTER SPEAKER, SURROUND
SPEAKERS and SUBWOOFER terminals.
When you select Dolby Pro Logic, Hall, Live, or Multi-CH
INPUT, be sure to turn on SPEAKERS A.
When the speakers are turned on, the SPEAKERS A indicator
lights up.
SPEAKERS B: This button turns on or off the speakers connected
to the FRONT SPEAKERS B terminals.
When the speakers are turned on, the SPEAKERS B indicator
lights up.
Note:
You cannot use the A and B speakers simultaneously.
Adjusting the tone (BASS, TREBLE)
Treble and bass adjustment is effective only for the Front speakers
and headphones.
BASS: Boosts or cuts the bass response.
TREBLE: Boosts or cuts the treble response.
Listening through headphones (PHONES)
You can connect stereo headphones to the PHONES jack using a
standard stereo plug.
If you connect headphones, the unit will enter STEREO mode
automatically, and no sound will be produced from the speakers. If
you have selected MULTI-CH INPUT, you will hear sound only
from the FRONT L and R channels.
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