Other than being well built and high priced ($15,000, $22,000, $60,000), these three phono preamps have very little in common, in design or in sound. One has vacuum tubes, including a direct-heated 5U4G rectifier tube (the Phasemation). Two are solid-state (the PBN and Qualia). Two feature separate chassis for the left and right channels (the Qualia and Phasemation). All three have outboard power supplies. Two come from Japan (the Qualia and Phasemation), one is made in the US (PBN). All three are elegantly built, inside and out. Two are physically attractive, one is lab-grade butt ugly. One has a host of convenience features, including various equalization curves and three inputs (Phasemation). One offers no adjustability whatsoever (Qualia). One has two gain settings and multiple loading options (PBN). Two are designed to be used only with moving-coil cartridges, while the third (Phasemation) can also accommodate moving-magnets. One is fully balanced and dual- differential (PBN), two are not.