SoftKrtl

API 550.

The API 550 equaliser, three bands whose Q sharpens as you boost.

£29
Waves API 550
Equalization
Compatibility
VST3 · AU · AAX
Formats
Waves
Developer

Overview

Proportional-Q, by design.

The API 550 is a proportional-Q equaliser, meaning each band narrows as you push it harder. Small moves stay broad and gentle, larger ones tighten and stay musical, which is why the curves have lasted since the late 1960s. The 550A gives three bands with five selectable frequencies each plus 50 Hz and 15 kHz filters, and the 550B four overlapping bands across wider, multi-octave ranges. Analog harmonic distortion and hiss are switchable.

Highlights

Models the API 550 equaliser
Proportional-Q: bands narrow automatically as boost increases
Resists the usual damage from over-boosting
Stepped frequency selection rather than continuous sweep
Encourages larger, more decisive moves
Developed with API from the original circuit
Mono and stereo components
Part of the API Collection

Compatibility

Specs and requirements.

Licence and delivery

Formats
VSTVST3AUAAX NativeAAX DSP
Licence
Perpetual licence
Delivery
Instant download
Type
Equalization
SKU
1246-2767
Product code
API550TDM

macOS

OS
11 or later (native Apple Silicon)
Processor
Apple Silicon & Intel

Windows

OS
10 or later (64-bit)
Processor
64-bit Intel / AMD

Apple Silicon and Intel Macs are both natively supported.

Waves

About the maker

Meet Waves.

Waves Audio, founded in 1992 in Israel, is one of the world's largest developers of audio plugins and signal processors. Its catalogue spans EQs, compressors, reverbs, and vintage console emulations used across music, film, broadcast, and live sound.

Waves API 550

£29