The SoundStandard graphic equalizers are versatile, multi-purpose devices with a range of features suitable for live sound and permanent installations. There are four models available three standard and a forth with individual band clip indicators. The standard models include 2215B stereo 2/3 octave, 2231B stereo 1/3 octave and 3231B stereo 1/3 octave with HPF and LPF. The forth model is the 3231FB 1/3 octave which has additional individual band clip indicators offering visual feedback to the operator for controlling problem frequencies. The graphic equalizers come with a range of input, output connectors and offer exceptional value.