jrokke,
I recommend going to Lowe's and buying a 40 ft Utilitec 14 AWG extension cord. Take it home, cut to length needed, terminate as desired, hook up and never look back. Cost of the Utilitec cord at my local Lowe's was $8.44 recently.
For more info look here:
Circles > Audio Manufacturers > Manufacturer's Mall > The Horn Shoppe > Topic: Question for Henry (Walmart Speaker Cables)
BTW: I've build all kinds of cables over the years and these are as good as any!
Best Regards,
TerryO