Basically, no you can't. The main speakers have very very low nominal impedance - around 2.7ohms - and would soon make the amp run out of juice, and the sub is a passive design - ie with no amp built-in - whereas the Onkyo needs to be used with an amp with its own amp onboard. So you'll have no bass whatsoever for the very brief time before the receiver goes into protection mode because the speaker impedance is so low.
You could do it, but the sound would be as thin as a pipecleaner that hero-worships Victoria Beckham, and the receiver would probably shut down faster than a Spice Girls world tour.