Best CHEAP long under-carpet speaker cable


I'm about to put down carpet in an area that will support a second mid-fi system. What's the best speaker cable to go underneath the carpet? The length has to be around 20-25 feet. Obviously the most important issue is that it's relatively flat.

What do you think?
kublakhan
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Check out River Cable Flexygy (sp?). They make some flat cable with supposedly great sonics, and not too pricey at all. I'm sure an e-search will bring back some good info.
If I am not mistaken, and I might be, but I beleive runnng speaker wires under carpet is a code violation. Anyone sure of this??
The Alpha Core series of flat cables would fit your needs. Available in bulk as well as pre-made.