"Out Of Stock Online" already.
Makes me wonder if it's a typo at that price

...it's just
so much lower than any subwoofer I've ever seen priced (no matter how crappy). The product indicates a weight of 30 lbs...so it's even got a bit of heft to it for $15

Has anybody seen it in their stores? - or is this a web effort only? Home Depot has a very small web-only team over in Atlanta...it's been part of their catalog division for a while. It's really quite a small effort from Home Depot...I know, we've tried to work with them for years (both with chairs and now with carts)
The lowest price online for that model (the LS10SW) is $79.99...with prices ranging p to $120.00. More in line with a cheap 10" sub with suspect 100watt amplifier in the market. You can buy one from Parts Express for that price (AudioSource or another)
Interesting, DUAL (once a German company) is a Korean company that builds gear in Shenzhen, China now
http://www.dualav.com/about.html