Onkyo TX-NR 838 Manual page 68

instruction manual.
Speaker Configuration
Allows you to change the speaker configuration such as presence or not of
each speaker, crossover frequency, and so on. Settings are automatically
configured if you use the Automatic Speaker Setup. Audio will not be output
while you are making this setting.
Subwoofer
Default Value: Yes
Set whether a subwoofer is connected or not.
"Yes": When subwoofer is connected
"No": When subwoofer is not connected
Front
Default Value: 80Hz(THX)
Select the crossover frequency from "40Hz" to "200Hz" to start
outputting bass frequencies for each channel.
"Full Band": Full band will be output.
"None": When no compatible speaker is connected
"Front" will be fixed to "Full Band" if "Subwoofer" is set to "No", and
the bass frequencies of the other channels will be output from the
front speakers. To make the settings, refer to the instruction manual
of the speakers used.
Center
Default Value: 80Hz(THX)
Select the crossover frequency from "40Hz" to "200Hz" to start
outputting bass frequencies for each channel.
"Full Band": Full band will be output.
"None": When no compatible speaker is connected
"Full Band" cannot be set unless "Front" is set to "Full Band".
Surround
Default Value: 80Hz(THX)
Select the crossover frequency from "40Hz" to "200Hz" to start
outputting bass frequencies for each channel.
"Full Band": Full band will be output.
"None": When no compatible speaker is connected