The DBX 166XS Dual Channel Compressor / Limiter / Gate is a professional audio device designed to provide dynamic control and processing for audio signals. With a frequency range of 20Hz-20kHz, this rack-mountable unit offers two channels of compression, limiting, and gating, making it ideal for a variety of audio applications. Featuring input/output ports including TRS 1/4", XLR, and 6.35mm, the DBX 166XS also offers active sidechain insert functionality, as well as graphic equalisation capabilities. This versatile device from dbx is perfect for enhancing and refining audio signals in a wide range of professional settings.