API 235L Noise Gate / Expander – 500 Series Module

The API 235L is a versatile and precision-engineered noise gate and expander module designed for the 500 Series format. With flexible dynamics control and the unmistakable API sound, the 235L is ideal for cleaning up tracks, tightening drum recordings, gating vocals, and reducing unwanted background noise — all while preserving musicality and punch.

At the heart of the 235L are API’s legendary 2510 and 2520 Op-Amps, ensuring pristine analog performance and fast, accurate response. The module features a wide Threshold range from -45 dBu to +25 dBu, providing precise control over when the gate or expander engages. With a Release time adjustable from 50 ms to 3 seconds, the 235L can be tailored for aggressive gating or smooth, natural transitions.

The 235L also offers a Gate/Expander mode switch, allowing you to toggle between a full gate and a more subtle 2:1 expansion ratio—perfect for situations where gentle noise reduction is required without abrupt cutoff artifacts.

Designed to work flawlessly in any API 500 Series rack, the 235L brings professional-grade noise control and dynamic shaping to your studio in a compact, powerful format.

Key Features:

• 500 Series format noise gate and expander
• Threshold control from -45 dBu to +25 dBu
• Release time adjustable from 50 ms to 3 seconds
• Selectable Gate or 2:1 Expander mode
• Classic API sound with 2510 and 2520 Op-Amps
• Ideal for drums, vocals, instruments, and live or studio noise control
• Fits all standard API 500 Series compatible racks

The API 235L is your go-to tool for dynamic noise management — combining flexibility, musical response, and API’s signature analog tone in one compact module.