The Mercury EQ-H1 Program Equalizer is a premium, single-channel tube equalizer inspired by the classic Pultec EQH design. Featuring a passive EQ circuit with a warm, musical tone and a tube-driven gain stage, it offers rich, vintage-style sound shaping. With selectable low and high-frequency bands and transformer-balanced I/O, the EQ-H1 is ideal for enhancing tracks during tracking, mixing, or mastering, delivering smooth, analog character with modern reliability.