ART EQ-355 Dual 31 Band Stereo Graphic EqualizerThe Model 355 Dual 31 Band 1 3 Octave Graphic Equalizer may be used in a variety of applications such as live sound, recording studios, instrument racks, DJ sound systems and fixed equipment installations. Designed to interface into any audio system, the Model 355 is a powerful tool for solving audio problems and creating interesting sound textures. Features Dual Channel 31 Band Graphic Equalizer Constant Q Filtering Balanced XLR, Active Balanced 1