SMM said:
I was planning to buy a pre-made sub cable. If I wire for more than 1 location, this could get expensive. Have you made your own sub cables, if so,,,how...and what if any performance difference from hoem made vs. store bought cables
If the sub cable is an interconnect, carrying pre-amplified signal (ie, the amp is builtin to the sub or placed near the sub, and the cable connects that amp to the processor), then the sub cable should be a good, double shielded interconnect that will reject background 60Hz electical noise. This is important; subwoofers *love* to reproduce 60Hz sounds. Hmmmmmmmm...
If the sub cable is carring the amplified signal, then all you need is a halfway decent quality speaker wire - I might get crazy and use 8 gauge copper, but you don't need to get any more exotic than that with a subwoofer. This is not the part to spend big money on.
I know people love to hide wires, but the subwoofer makes a reasonable exception. It's the speaker you're most likely to want to move around. If you MUST hide all wires, consider buying a passive (no integrated amp) subwoofer and a separate amp, so you can run speaker wire, not interconnect cable, to all the places you might want the sub.
If you're going to run interconnect cable to an amp, I'll make a commonly echoed suggestion - look at Blue Jeans Cable. Decent cable, decent (for audio) price, and they sell a well-shielded version of interconnect just for this situation. I use it and like it.