API 550A

EQ
Waves

The API 550A is a 3-band parametric equalizer modeled on a late 1960s API design, delivering the warm, musical sound that defined high-end studio recording for decades. It offers reciprocal equalization across 15 points with switchable peaking or shelving on the low and high bands, plus an independent 50Hz–15kHz bandpass filter. With Proportional Q technology that intuitively adjusts bandwidth based on gain settings, the API 550A allows aggressive equalization while maintaining smooth, natural results.

Available for:VSTAUAAX

Key Features

  • 3-band parametric EQ with 5 fixed cutoff points per band
  • Low and high bands switchable between Shelf and Bell filter types
  • Mid band fixed Bell filter type
  • Independent 50Hz–15kHz bandpass filter
  • ±12dB gain range with 2–3dB steps per band
  • Proportional Q automatic bandwidth adjustment
  • Analog modeling toggle for vintage character
  • Phase inversion and output level controls
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