Hello, First post and of course it's a question. I'm hooking up my first hi-fi unit after listening to just boomboxes in the past. I am confused about my Onkyo TX-8511's impedance selector. I'm just going to be driving a pair of Sony 8 ohms SS-MF750H floorstanders. I hooked the wires into the 'A' speaker wire inputs and left the 'B' inputs empty. The two options on the impedance selector are:

OPTION 1:
A or B: 8 ohms min./speaker

OPTION 2:
A or B: 4 ohms min./speaker
A+B: 8 ohms min./speaker

This would seem like an easy choice but the way they've worded it makes it confusing. I'm thinking Option 1. Am I right? Or will I get clipping if I go that way? Thanks in advance for any advice.