While it’s not uncommon for USB-powered stereo speakers to resemble Macs, a subwoofer is almost never part of the equation. But that’s exactly what you get with UltraLink’s UCubeTrio 2.1 Multimedia Speaker System ($350). Along with a pair of 3” square speakers, a 5” square USub subwoofer brings the bass. The silver aluminum and black lacquer materials perfectly match your MacBook or iMac.