We all know subwoofers make bass. Big subwoofers, like the $799 Epik Empire, can sport massive 15-inch woofers and a Class D 600-watt power amplifier, all packaged in a 22x18x24-cabinet. The Empire's 120-pound weight might be a not-so-subtle indication that it's solidly built.
But Eminent Technology's TRW-17 Rotary Woofer ($12,900) doesn't have a cone-type woofer or a box or cabinet. No, the TRW-17 looks like a high-tech fan. And when you turn it on, the fan's blade spins just like a fan, but it's a bona-fide subwoofer. It produces deeper and more powerful … Read more