DBX 131S Single 31-Band Graphic Equalizer

For over forty years, dbx® has been the go-to choice for audio professionals who demand nothing less than industry-standard equalisation. The dbx 131s carries forward this legendary heritage, providing a single 31-band channel of 1/3-octave equalisation that meets the rigorous demands of touring, studio work, and permanent audio installations. Built with the same meticulous attention to detail that has made dbx EQs the professional’s choice, this unit combines proven reliability with straightforward operation.

The 131s features switchable ±6 dB or ±12 dB boost/cut ranges across its Constant Q frequency bands, complemented by ±12 dB input gain control and precision 20mm nonconductive sliders. Professional connectivity comes standard with both XLR and TRS inputs and outputs, while the intuitive front panel includes a bypass switch and 4-segment LED output level monitoring. A 12dB per octave low-cut filter provides additional control with 3dB down at 50Hz.

With an extended frequency response spanning less than 10Hz to greater than 50kHz and a dynamic range exceeding 108dB, the 131s maintains exceptional sonic integrity throughout its operating range. This combination of superior specifications, quality componentry, and dbx’s renowned build quality ensures consistent performance in the most demanding professional environments, making it an essential tool for any serious audio application.