I have a TX-SR600 Onkyo receiver. The Onkyo manual explicitly states not to use 4 ohm speakers, just 6 ohm to 16 ohm.
How would I connect my PSW250 subwoofer?
Obviously the best way according to the Polk website which is using the left/right front speaker wires running from the receiver through the subwoofer and then into the right/left front speakers is not an option since the Onkyo TX-SR600 is not made for speakers below 6 ohms.
I presently have my "filtered" Onkyo subwoofer rca preout running into one of the left/right line in rca inputs on my Polk PSW250 since the PSW250 does not have a separate LFE input jack.