A graphic equalizer offers many narrow bands (often 10 or 31) laid out like a bar chart, while a quad equalizer offers just four broader ones.
Graphic equalizers suit precise, surgical corrections — removing one specific problem frequency in a room or recording. A quad equalizer suits faster, broader shaping — adjusting overall warmth, body, clarity, and air without hunting through a dozen sliders. For everyday listening, four good bands usually get you further, faster. For the specifics of this tool’s four bands, see the 4-Band Equalizer and Quad Band Equalizer pages.
A 31-band graphic equalizer can take real training to use well, since so many overlapping bands interact with each other. A quad equalizer's four widely-spaced bands are far easier to reason about, which is exactly why it suits quick, confident adjustments.