Do you know how the EQ controls work? (Low, Mid, High)
Each band affects a different area of the frequency spectrum:
Low: 0–125Hz (max) to 375Hz (min)
Mid: 125Hz (min) to 375Hz–1250Hz (max) to 3750Hz (min)
High: 1250Hz (min) to 3750Hz–Infinity (max)
The (min/max) values represent the range of attenuation or boost applied to each band.