I’ve lost track of how many Schitt headphone amplifiers and digital converters I’ve reviewed, but their all-new Mani phono stage is a very different kind of product. Mani amplifies the minuscule voltages generated by a turntable phono cartridge, so your LPs can be played over AV receivers, desktop powered speakers, boom boxes, etc. The little Mani’s all-metal chassis measures a scant 5 × 3.5 × 1.25 inches (127 × 89 × 32 mm). It works with moving-magnet (MM) or moving-coil (MC) phono cartridges. Mani has four user-selectable “gain” modes (30-, 42-, 47-, and 59-dB), so it’ll sound great with any...