Using the 950 Gonk is 100% correct (as usual)! Some processors have a R/L sub output. In that case you would not use a 'Y' adaptor, just direct connection. As far as bi wiring --- only do this if you have the same type (and length) of cable for each 'wire'. If you use different cable/length you can incorporate a VERY SLIGHT time delay between each wire which will not be audible except a slight loss in stereo imaging (sound staging).