So we tore the speakers open to investigate. Instead of a Möbius strip, each speaker has a long C-shaped duct in the back that provides a larger space for low tones to resonate. The end of the duct is flared like a trumpet bell and seamlessly joins the speaker’s front face (behind the black grille) to minimize bass-distorting turbulence. That smooth surface reminded someone at Sony of an obscure mathematical construct that’s related to a Möbius strip and, in a corporate game of Telephone, the information got twisted into describing the ducts themselves as having a “unique mobius-band shape.” Although the underlying concepts got muddled in the marketing, the impressive bass proves that Sony’s engineers were thinking clearly all along.