Denon AVR-1803 Operating Instructions Manual page 35

Set the external input (EXT.
IN) mode.
Press the EXT. IN to switch
the external input.
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Once this is selected, the input signals connected to the FL
(front left), FR (front right), C (center), SL (surround left), and
SR (surround right) channels of the EXT. tN jacks are output
directly to the front (left and right), center, surround (left and
right) speaker systems without passing through the surround
circuitry.
In addition, the signal input to the SW (subwoofer) jack is
output to the PRE OUT SUBWOOFER lack.
2 Cancelling the external input mode
To cancel the external input (EXT. IN) setting, press the INPUT
MODE (AUTO, PCM, DTS) or ANALOG button to switch to
the desired input mode. (See page 33.)
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When the input mode is set to the external input (EXT. IN), the play
mode (DIRECT, STEREO, DOLBY/DTS SURROUND, 5CH/6CH
STEREO or DSP SIMULATION) cannot be selected.
NOTES:
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In play modes other than the external input mode, the signals
connected to EXT. IN jacks cannot be played. In addition, signals
cannot be output from channels not connected to the input
jacks.
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The external input mode can be set for any input source. To
watch video while listening to sound, select the input source to
which the video signal is connected, then set this mode.
HI Adjusting the sound quality (tone)
The tone control function will not work In the direct mode.
1 The tone switches as follows each time the TONE CONTROL
button is pressed.
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BASS - TREBLE
2 With the name of the volume to be
adjusted selected, turn the SELECT
knob to adjust the level.
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To Increase the bass or treble: Turn the control clockwise.
(The bass or treble sound can be increased to up to +I2 dB
in steps of 2 dB.)
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To decrease the bass or treble: Turn the control
counterclockwise. (The bass or treble sound can be
decreased to up to -12 dB In steps of 2 dB.)
3 If you do not want the bass and treble to be adjusted, turn on
the tone defeat mode.
TONE DEFEAT
%
I The signals do not pass through the
bass and treble adjustment circuits,
so it provides higher quality sound.
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