Yamaha GQ1031 is a 31-band stereo graphic equalizer. This model is perfect for home as well as professional audio applications. With its high-quality components and construction, it provides precise frequency response control over virtually any audio signal for a variety of applications. The GQ1031 features 31 bands of equalization at standard ISO 1/3-octave frequencies, allowing for extremely fine control over the sound. Each band can be boosted or cut by up to 12 dB, providing a wide range of possibilities for shaping the sound.