The dbx 231s is a dual-channel 31-band graphic equalizer designed for professional audio applications. Each channel offers 31 ISO center frequencies, providing precise control over your sound.

- Dual 31-band EQ with 1/3-octave bands
- Constant-Q filters for accurate response
- Adjustable high-pass filter on each channel
- +6 dB or +12 dB boost/cut range switch
- XLR and 1/4" TRS balanced inputs and outputs

Built with dbx's proprietary technology, the 231s delivers low noise and high headroom, making it suitable for live sound, recording studios, and installed systems. The unit features a rugged steel chassis and intuitive controls for easy operation.

This equalizer includes a bypass switch per channel and an illuminated power switch. It operates on standard AC power with an internal power supply.