i have the onkyo tx-sr601 receiver and i just bought my sub(BIC Venturi V-1000r ) from my uncle and i am confused on how to hook it up. my delima is this there are 2 options for the sub rca cable 1st is rca "subwoofer input" which it says is for 5 channel sound 2nd is another rca plug that says "full range input cross over bypassed " inwhich the book says to plug in ther for receivers that are doldby digital ,dolby ac-3 or thx so what one do i use??