Used API 550b Rack Equipment

Used API 550B rack EQ in excellent condition, delivering the classic API punch and musical tone. This 4-band analog equalizer features proportional-Q filters, switchable frequency points per band, and up to ±12 dB gain for precise shaping without harshness. Built for professional studio and live racks, it offers wide headroom, low noise performance, and the signature API sound that brings drums, vocals, guitars, and mixes forward with clarity and impact.