Check it out: 12-inch driver, 150-watt amp, and a really nice-looking curved enclosure, all for a mere $84.10 (plus $9.72 shipping and handling). If you asked me how inexpensively someone could sell a 12-inch subwoofer—and I’m talking everyday prices, not blowouts on eBay or Amazon — I’d have probably guessed $200, and that would be for something really ugly and cheap-looking.