onkyo 656 (2 sub confusion)

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Joined
23 Jan 2019
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2
hi guys I'm new to this forum but not to hifi,
Q the 656 is a 7.2 receiver.
the back of the receiver has 2 outputs for 2 subs
so that's all good until you use on screen menu
which only allows 7.1 config , so how are you supposed
to calibrate receiver properly, makes no sense
any help explanation would help
ps surely its a onkyo mistake or they future proofed
themselves ???
 
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