dbx 215s Dual 15-Band Graphic EqualizerWith the dbx heritage of revered pro EQs, the 215S meets the needs of the most demanding sound reinforcement environments, while offering the simplicity of straightforward controls. With a proven track record that spans four decades, dbx EQs are the industry standard for touring, studios, and audio installations. The dbx 215S includes two 15 band channels of 2 3 octave equalization, 12 dB input gain, switchable 6 dB or 12 dB boost cut range, 20mm