Sunfire’s miracle sub: Big bass from a toaster-size box.
For subwoofer designers, the laws of physics boil down to: Small box, low cost, high output — pick any two. You can always shrink the enclosure, but to get decent output from it, you’ll need a high-powered amp and a beefy driver. And if you shrink the box way down, as Sunfire did with its new Atmos subwoofer, you’ll need to go even more extreme.