Philippe, your reading of the manual may have answered your question, but since your 1082(3802)is a 7.1 receiver the setup is pretty straightforward. You'd connect the back surround terminals to the QS8s as normal, of course, and in the speaker setup menu show the presence of the speakers. Since the 1082 doesn't have DPLIIx(and there is no 7.1 format)you won't have stereo back speakers, but even for a mono 6th channel it's suggested to use two rather than one back speaker.

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Enjoy the music, not the equipment.