do i need to plug my amp lead into both of the RCA sockets? I have: High level twin Neutrik Speakon and low level twin phonos 0db +12dB respectively, on the sub itself. Am i only to use one cable with one single RCA plug on each end or am i going to need a bi-wire with two plugs on each end. OR WHAT? Please bare in mind i dont have my amp ( <a href="http://www.homecinemachoice.com/testbench/Amplifiers/Denon/DenonAVC-A10SE.shtml" target="_blank">Denon AVC-A10SE</a> ) yet (tuesday next week).