Subwoofer Cable Connections and Selection

Thanks yogi.  As I was looking at the back of my sub I scraped the dust off the interconnects and saw they are Starightwire.  Laser Link model is what I have for my other interconnects so these are probably the same.  Better than I thought and now I'm not sure that an upgrade is warranted.  They are standard interconnects so there is a left and right on both ends.

I am still a little confused as to why all the cables for subs are single cables but it looks like two may be required without using a Y adapter.  Is that just to make it cheaper?  So do I get 2 Y connectors, one for the preamp and one for the sub and put a single interconnect between them?  I noticed the Straightwire sub ICs have a built in Y but have not seen that on others (http://www.straightwire.com/interconnects_subwoof.html).

I would rather not go back from the sub to the amp because I think that's just too much of a run and a chance to degrade the signal.  I'm also bi-wiring so I already have a lot of wire coming out the back of the sub so no need to add more wires via speaker level connection.

Finally, is there a difference between cables made for subs and a standard interconnect like I have?  With all things being equall, will a sub IC sound better than a standard IC when connected to a sub?

Thanks for the links too. 

Ken

I decided to stick with my Straighwire interconnects.  I guess I just got confused seeing all the single sub cables and no examples of a 2-channel pre with a L&R out.  I also ocompletely forgot I had decent ICs to begin with. It's all hooked up good.  Thanks to everyone for your input.