I have just bought my first "proper" home cinema package which is KEF 2005.2's plus a Yamaha RXV540 receiver. On the back of my receiver I have a single socket sub output whereas on the back of the sub, the only input is a L + R socket ie. 2 sockets. I have a decent sub lead which only has one plug on each end. Should I buy a different type of lead or should I just plug the sub lead in to either the L or R input on the back of the sub? Will this work just as well and if so, does it matter whether I choose the L or R socket? Thank you!