Developed in association with Automated Processes Incorporated, the API Collection features four precision processors based on renowned API modules: the 550A 3-Band Equalizer, the 550B 4-Band Equalizer, the 560 Graphic Equalizer, and the 2500 Stereo Compressor.
Used by engineers worldwide on countless hit records, these modules deliver a sound like no other. And with the API Collection, Waves captures every nuance of their unique sonic signatures.
As the latest addition to our family of modeled hardware processors, the API Collection carries on the Waves legacy of advanced audio technology.
The API Collection is much more than software emulations of hardware; it is the sound of API.
API 550A

Modeled on the late 1960's legend, the API 550A EQ provides reciprocal equalization at 15 points in 5 steps of boost divided into three overlapping ranges. The high and low frequency ranges are individually selectable as either peaking or shelving, and a band-pass filter can be inserted independently of all other settings. The 550A is a uniquely powerful equalizer with that one-of-a-kind API sound.
Features
- 5 selected frequency centers per band
- Reciprocal and repeatable filtering
- Maximum 12 dB of boost/cut per band in 2-3 dB steps
- "Proportional Q" narrows filter Q at extremes
- High headroom +30 dB clip level
- Up to 24bit, 192kHz resolution (TDM 24/96 only)
- Mono and Stereo components
- Supports RTAS, Audio Suite, VST, AU
- PC and Mac compatible
Controls
- HF Filter Gain -12dB to +12dB
- HF Filter Frequency 5KHz, 7KHz, 10KHz, 12.5KHz and 15KHz
- MF Bell Filter Gain -12dB to +12dB
- MF Bell Filter Frequency 0.4KHz, 0.8KHz, 1.5KHz, 3KHz and 5KHz
- LF Filter Gain -12dB to +12dB
- LF Filter Frequency 50Hz, 100Hz, 200Hz, 300Hz and 400Hz
- Filter On/Off 50Hz to 15KHz Band Pass Filter
- LF Filter Type Low Shelf or Bell
- HF Filter Type Hi Shelf or Bell
- EQ IN On/Off
- VU Meters -30dB to 0dB With Clip indicator
- Output Controls
- Analog On/Off
- Phase Polarity Reverse On/Off
- Output Gain -18dB to +18dB
- Trim Output Gain Adjustment
API 550B

Featuring four overlapped EQ bands, the API 550B is invaluable as both a problem solver and a sweetening device. With 7 switchable filter frequencies spanning up to 5 octaves per band, the 550Bโs โProportional Qโ automatically widens the filter bandwidth at minimal settings and narrows it at higher settings. It even lets you undo previous processing, affect or even reverse tonal modifications. With its vast range of tonal possibilities, the API 550B is a versatile EQ for all your processing needs.
Features
- 7 selected frequency centers per band
- Reciprocal and repeatable filtering
- 12 dB of boost/cut per band
- Bands 1 and 4 offer shelf/peak switching
- High headroom +30 dB clip level
- Up to 24bit, 192kHz resolution (TDM 24/96 only)
- Mono and Stereo components
- Supports RTAS, Audio Suite, VST, AU
- PC and Mac compatible
Controls
- HF Filter Gain -12dB to +12dB
- HF Filter Frequency 2.5KHz, 5KHz, 7KHz, 10KHZ, 12.5KHz, 15KHz and 20KHz
- HF Filter Type Hi Shelf or Bell
- HMF Bell Filter Gain -12dB to +12dB
- HMF Bell Filter Frequency 800Hz, 1.5KHz, 3KHz, 5KHz, 8KHz, 10KHz and 12.5KHz
- LMF Bell Filter Gain -12dB to +12dB
- LMF Bell Filter Frequency 75Hz, 150Hz, 180Hz, 240Hz, 500Hz, 700Hz and 1KHz
- LF Filter Gain -12dB to +12dB
- LF Filter Frequency 30Hz, 40Hz, 50Hz, 100Hz, 200Hz, 300Hz and 400Hz
- LF Filter Type Low Shelf or Bell
- EQ IN On/Off
- Meters -30dB to 0dB With Clip indicator
- Output Controls
- Analog On/Off
- Phase Polarity Reverse On/Off
- Output Gain -18dB to +18dB
- Trim Output Gain Adjustment
API 560



Based on the 1967 classic, the API 560 10-Band Graphic Equalizer features precision filtering and high headroom, ideal for signal enhancement and room tuning. The API 560's curve shaping potential is unmatched, while API's unique "Proportional Q" design intuitively widens the filter bandwidth at lower boost/cut levels and narrows it at higher settings. And since boost and cut characteristics are identical, previous actions can be easily undone. For precision equalization with unmatched versatility, turn to the EQ heard on top recordings for decades: the API 560.
Features
- Familiar one octave centers
- 12 dB of boost/cut per band
- "Proportional Q" narrows filter Q at extremes
- Additional resolution in the critical ยฑ4 dB region
- Clip level > +28 dBu
- Up to 24bit, 192kHz resolution (TDM 24/96 only)
- Mono and Stereo components
- Supports RTAS, Audio Suite, VST, AU
- PC and Mac compatible
Controls
- Per Band Gain -12dB to +12dB
- Band Frequencies 31Hz, 63Hz, 125Hz, 250HZ, 500Hz, 1KHz, 2KHz, 4KHz, 8KHz and 16KHz
- EQ IN On/Off
- VU Meters -30dB to 0dB With Clip indicator
- Output Controls
- Analog On/Off
- Phase Polarity Reverse On/Off
- Output Gain -18dB to +18dB
- Trim Output Gain Adjustment
API 2500

The API 2500 is a versatile dynamics processor that lets you shape the punch and tone of mixes with absolute accuracy. Its dual channel design lets the 2500 also function as two separate mono channels via a single compression setting. Using auto-makeup gain, you can adjust Threshold or Ratio while automatically maintaining a constant output level. With both "feed back" and "feed forward" compression types, the API 2500 boasts a wide range of incredibly musical parameters which have made it a favorite of engineers the world over.
Features
- Switchable 3-position Thrust high-pass filter
- Variable Link left and right channels
- 3 Variable Link filter types
- 3 Compression modes: Soft, Medium and Hard Knee
- 6 Release settings: 5 fixed, 1 continuous
- Up to 24bit, 192kHz resolution (TDM 24/96 only)
- Mono and Stereo components
- Supports RTAS, Audio Suite, VST, AU
- PC and Mac compatible
Controls
- Compressor Controls
- Threshold -20dBu to +10dBu
- Attack 0.03ms, 0.10ms, 0.30ms, 1 ms, 3 ms, 10 ms and 30 ms
- Ratio 5:1, 2:1, 3:1, 4:1, 6:1, 10:1 and Infinity:1
- Release 0.05s, 0.1s, 0.2s, 0.5s, 1.0s, 2.0s and Variable Release mode
- Variable Release 50ms to 3s
- Tone Controls
- Threshold Knee Hard, Medium and Soft
- Detector Thrust Loud, Medium and Normal
- Tone Type New (Feed-Forward) or Old (Feed-Backward)
- Link Controls
- Filter Type HP, LP and BP
- L/R Link Independent, 50%, 60%, 70%, 80%, 90% and 100%
- VU Meters
- Input/Output -30dB to 0dB With Clip indicator
- Gain Reduction 0dB to 30dB
- Meter Source GR, IN or OUT
- Output Controls
- Analog On/Off
- Compressor In On/Off
- Bypass On/Off
- Make-Up Gain Auto/Manual
- Make-Up Gain -24dB to +24dB
System Requirements
PC
- Processor - Intel Core 2 Duo 2GHz /ย
- AMD Athlon 64 or equivalent
- Ram - 4 GB
- Operating System - Windows 7 | Windows 8 /ย GEQ requires Windows 7 with SP1 or Windows 8
- Screen Resolution - 1024x768 32-bit
- 32-Bit & 64-Bit
Mac
- Processor - Core Duo 2.3Ghz
- Ram - 4 GB
- Operating System - 10.6.8 - 10.8.3
- Screen Resolution - 1024x768
- 32-bit and 64-bit audio hosts
Trial Version Installation Instructions
1.
Download the Waves Complete Web Installer. On a PCย run theย WOLI.exeย file, on Macs unzip and launch theย WOLI_V9.app. After you launch it you will see the following screen:

2.
Click on Continue. Read the License and then click Continue again. You will be prompted to Agree or Disagree with the License terms. Once you agree you will see a list of all Waves plugins and bundles, as pictured below:

2a.
If you are looking for the Single plugins they are at the bottom of the long list. They are there as a single collapsed item and you will need to click the small triangle next to the "Single Plug-ins" to expand and see the full list. Then proceed as normal.

3.
Tick the checkbox next to the product that you wish to have installed. This installer will take care of the download - this is what it will look like:

4.
Once the download is complete the installer will ask you to quit all running audio applications. Once you've done that the plugins will begin installation. This may take up some time so be patient at this point. When this process finishes - the installation is complete and you can run your trial version now.