AV help

Help

I want to buy the above Onkyo TSR605 AV amp but what i want to do is use a PC 6.1 surround set that I have sitting up stairs doing nothing


Can I just cut the phono sockets off the speakers and use them? also how could I connect the sub if at all possible?

This is the connection panel on the back of the sub



A large picture of the back and connections for the AMP

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