Marantz NR1608 - Speaker and Sound Field Adjustments; Center Spread for wider soundstage; DTS Neural:X audio processing; Subwoofer On;Off setting

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Center Spread
Center Spread expands the center channel signal to left and right front
speakers to create a wider frontal audio image for the listener. It is
optimized and designed primary for playback of stereo music content.
On: Use “Center Spread”.
Off
(Default):
Do not use “Center Spread”.
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You can set this when sound mode is “Dolby Surround”.
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DTS Neural:X
DTS Neural:X Expands the non-object based audio signals and
optimizes them for your speaker configuration.
On
(Default):
Use “DTS Neural:X”.
Off: Do not use “DTS Neural:X”.
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You can set this when sound mode is “DTS:X” or “DTS:X MSTR”.
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Subwoofer
Turn subwoofer output on and off.
On
(Default):
The subwoofer is used.
Off: The subwoofer is not used.
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You can set this when the sound mode is “Direct” or “Stereo” and in the menu
“Subwoofer Mode” is set to “LFE+Main”. (v
p. 191)
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Set Defaults
The “Surround Parameter” settings are returned to the default settings.
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