Just received my Outlaw 1070 smile and have Onix Rocket speakers (RS750 x4 and a RSC200) on order.

The Rocket RS750s have a 6 ohm impedance and the RSC200 has a 4 ohm impedance.

Noted the impedance selector on the back panel of the 1070 has two choices, 4 or 8 ohms. Which setting do I choose?

Thankyou for your time.