API Select SR24 Dual-Channel 4-Band Parametric Equalizer
The API Select SR24 is a powerful and musical dual-channel 4-band equalizer, housed in a rugged 2U rackmount chassis. Inspired by the legendary APSI 562 EQ—originally produced and distributed by API in the late 1970s and early 1980s—the SR24 brings the highly sought-after tonal shaping of the original design back to modern studios with updated performance and connectivity.
Each channel of the SR24 features four fully parametric peak/dip bands with independent controls for frequency and gain, offering up to ±12 dB of boost or cut per band. With intuitive front panel layout and dedicated knobs for every function, the SR24 is extremely fast and easy to use — ideal for tracking, mixing, mastering, or live sound applications where speed and precision matter.
The circuit design stays true to the sonic character of the original APSI 562, while benefitting from API’s modern engineering expertise. The custom transformer-balanced outputs and fully balanced XLR and 1/4” TRS inputs/outputs provide pristine analog audio with massive headroom (+24 dB clip level), ensuring clarity and punch even in high-SPL environments.
Key Features:
- 2-channel, 4-band parametric equalizer in a 2U rackmount format
- Based on the classic APSI 562 EQ design
- Continuously variable frequency and gain controls on each band
- ±12 dB of boost or cut per band
- All bands in peak/dip parametric configuration
- Custom transformer-balanced outputs for analog warmth and depth
- Fully balanced XLR and 1/4” TRS inputs and outputs
- High headroom design with +24 dB clip level
- Fast, intuitive control layout with dedicated knobs for each function
The API Select SR24 delivers classic parametric EQ tone in a modern, rack-ready unit — perfect for engineers and producers seeking vintage musicality, surgical control, and the reliability of API’s world-class analog design.