You asked the same questions and received the same answers on the Polk site. What, do you think they don't know what they are talking about??? Buy the damn cable from Polk, it's only about $40.00 and if you ever sell the speakers it will make the sale much easier.
BTW, songwriter is correct, you're not even using all the drivers without the interconnect cable, just image how much better they will sound with all the drivers working!!!
BTW, songwriter is correct, you're not even using all the drivers without the interconnect cable, just image how much better they will sound with all the drivers working!!!