It’s not new but Steinway Lyngdorf’s S-15 remains stunning in its aesthetic and technical design. Visually, this tiny treasure has little in common with your garden-variety box speaker—nor should it, considering its pedigree. For starters, it’s 10 inches tall, 8 inches wide, and only 3 inches thick—or about a half-inch wider and an inch thicker than the 1997 Webster’s New World College Dictionary collecting dust on a shelf in my office.