The Behringer XR 2400 is a specialized signal processing module designed to provide dynamic range control and noise reduction for professional audio systems. Functioning primarily as an autoquad expander/gate, this unit is engineered to detect low-level signals—such as background noise or bleed from other sources—and automatically attenuate them when they fall below a user-defined threshold. Unlike a simple noise gate, its "autoquad" detection circuit is designed to respond more musically and transparently to complex program material, making it particularly effective on drum kits, vocal microphones, and other sources where quick, intelligent noise reduction is needed without introducing audible artifacts like chopping or pumping. This processor helps to clean up individual channels or subgroups within a mix, resulting in a tighter, more professional sound with greater clarity and impact.

The unit offers comprehensive control over the expansion/gating action, with parameters including threshold, attack, release, range, and hold. The threshold control sets the level at which the expander becomes active, while the attack and release times determine how quickly the gain reduction is applied and removed, allowing the user to tailor the response to the transient nature of the source. The range control sets the maximum amount of attenuation applied to signals below the threshold, effectively determining how "closed" the gate becomes. A key feature is the inclusion of sidechain filtering, which allows the detector circuit to focus on a specific frequency band, enabling more precise gating. For instance, it can be set to trigger only on the low-frequency thump of a kick drum while ignoring higher-frequency cymbal bleed.

Housed in a standard 19-inch, single rack unit chassis, the XR 2400 is built for integration into fixed installation racks, portable sound rigs, and studio signal chains. It features balanced XLR and 1/4" TRS inputs and outputs for versatile connectivity. The front panel provides clear metering of the gain reduction being applied, offering visual feedback for precise adjustment. For live sound engineers and studio technicians seeking an affordable yet effective tool to control noise, tighten drum sounds, and add definition to a mix, the Behringer XR 2400 provides a dedicated, user-friendly solution for dynamic range management.