Ok, went out today and bought ratshack rca-1/4 plugs: http://www.radioshack.com/product.as...5Fid=274%2D320 As son as I plug connect my receiver poutput to either of the inputs, I get a humming noise thru my speakers (even before sub is powered on). Both with BFD on and off. Did I buy the wrong ones? Can I still at least plot my FR today even without BFD plugged in, then ones I get BFD ironed out, jump right into setting filters? Thanks!