You're right, you can select between 2 speaker system. In my case, switching between "speaker A" and "speaker B" just means listening to tweeter/midrange or bass woofer.
How many sets of speaker cable?
Not a question of life and death for me at this point, just out of curiosity, how many sets (pairs) of speaker cables you can connect to your integrated amplifier? My Marantz Pm 11s2 (www.avguide.com/review/tas-194-marantz-pm-11s2-integrated-amplifier) has outputs for 2 sets which is perfect for my system, since I need separate cable to tweeter/midrange and woofer, so I'm using one regular set and one bi-wire. But I see a lot of integrated with only 4 outputs instead of 8...am I missing something? Could such integrated amps be unusable in my system? Thank you all