API 550 is an equalizer plugin from Waves that recreates the 550A and 550B EQ units from API, with three-band and four-band versions in one package.
API 550 at a glance
| Developer | Waves |
|---|---|
| Type | Effects / EQ |
| Formats | VST2, AU, AAX |
| Operating systems | Windows 10 or later, macOS |
| Price on Plugin Boutique (October 2026) | €31.74 (regular €165.41) |
What API 550 does
The 550A version has three bands with five selectable frequencies, and its low and high bands switch between peak and shelving response. The 550B version has four overlapping bands covering multi-octave ranges. Frequencies are chosen to lift instruments forward or place them further back in a mix, and the Q of each band changes with the gain, so boosting narrows the band for a more focused tone while cutting widens it.
Key features
- 550A three-band section. Three bands with five selectable frequencies cover the range from 50 Hz to 15 kHz, and the high and low bands switch between peak and shelving response.
- 550B four-band section. Four overlapping bands cover multi-octave ranges, giving a wider spread of frequencies than the 550A layout.
- Q follows gain. The Q of each band changes with the gain, so boosting narrows the band for a more focused result and cutting widens it.
- Convenience controls. A phase switch, output trim and metering are included alongside the EQ bands.
API 550 compared with similar plugins
VEQ-55B from Antelope Audio is an equalizer for Windows and macOS. EQual from IK Multimedia is an equalizer offered as VST3, VST2, AU and AAX for Windows and macOS.
| Plugin | Developer | Type | Formats | Systems | Price |
|---|---|---|---|---|---|
| API 550 | Waves | EQ | VST2, AU, AAX | Windows, macOS | €31.74 (regular €165.41) |
| VEQ-55B | Antelope Audio | EQ | Windows, macOS | €98.18 | |
| EQual | IK Multimedia | EQ | VST3, VST2, AU, AAX | Windows, macOS | €118.99 |
| Linear Phase Equalizer | IK Multimedia | EQ | VST3, VST2, AU, AAX | Windows, macOS | €59.49 |
| EQ PB | IK Multimedia | EQ | VST3, VST2, AU, AAX | Windows, macOS | €118.99 |
Price and availability
API 550 was listed on Plugin Boutique in October 2026 at €31.74, reduced from €165.41. Prices change often, so the store page shows the current one.
API 550 FAQ
Where can I download API 550 crack for free?
The plugin is distributed as a crack, and the Windows build is packed as a repack with .rar and .iso files.
Is there a working serial key or keygen for API 550?
A keygen and a serial key are the strings most often typed alongside the plugin name.