Yamaha EQ-630 is a sophisticated graphic equalizer that provides precise control over the sound spectrum. With 10-octave bands per channel, you can tailor the sound to your personal preferences or to suit the acoustics of your listening environment. The EQ-630 also features a built-in spectrum analyzer, allowing you to visualize the frequency response of your source material and make adjustments accordingly. For added versatility, the EQ-630 offers eight preset memory locations for storing and recalling your favorite equalization curves.