Onkyo TX-NR 838

"Full Band" cannot be set unless "Front" is set to "Full Band".
Back
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
In the following cases, the setting will be set to "None":
– "Surround" is set to "None".
– "Front Speakers Type" is set to "Bi-Amp".
– "Powered Zone 2" is set to "Yes" and also Zone2 is set to on.
"Full Band" cannot be set unless "Surround" is set to "Full Band".
Back Channel
Default Value: 2ch
Select the number of channels of the connected surround back speaker.
"1ch": When one speaker is connected (Connect to the BACK or
HEIGHT L terminal)
"2ch": When two speakers are connected
The setting cannot be changed if "Back" is set to "None".
Wide
Default Value: None
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
In the following cases, the setting will be set to "None":
– "Surround" is set to "None".
– "Front Speakers Type" is set to "Bi-Amp".
– "Powered Zone 2" is set to "Yes" and also Zone2 is set to on.
"Full Band" cannot be set unless "Front" is set to "Full Band".
Height
Default Value: None
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