Phono 1

About the Phono 1

The Promitheus Audio Phono 1 is a small-production, dual-mono phono preamplifier designed for both moving-magnet (MM) and moving-coil (MC) cartridges. It uses an external power supply to reduce magnetic-field and vibration interference, a discrete Class A zero-feedback output stage, selectable gain, and user-adjustable cartridge loading. The manufacturer describes it as compatible with cartridges ranging from high-output MM designs to very-low-output MC models. Available information does not clearly establish whether this exact model is currently manufactured; it appears to have been produced in small numbers, but no definitive discontinuation notice was found.