Wolff Audio FREQ 500 Series Parametric EQ with Proportional Q

The Wolff Audio FREQ 500 Series parametric EQ with proportional Q brings decades of engineering expertise to the modern 500 series rack. Designed by Paul Wolff, this 4-band sweepable EQ uses proportional Q curves, so the bandwidth narrows as you boost or cut—making surgical notches and wide boosts equally precise. Unique to this model, the 1/3-octave capability in the high-mid and low-mid bands lets you carve tight spaces in a mix without losing musicality. The Cinemag nickel and steel output transformer delivers a balanced sound with low distortion, while the true hardwire bypass maintains your signal integrity. Build quality, accuracy and flexibility set this EQ apart for demanding studio work.

Pro-Level EQ Control and Build From Wolff Audio

Engineers, producers and mixers who need accuracy and musical control will find the FREQ essential for shaping sound. The 4-band design, with selectable shelf options and proportional Q, adapts to both broad tone shaping and pinpoint problem-solving. Tight 1/3-octave settings allow for detailed work on vocals or instruments, while wide shelves smooth out entire tracks. The hardwire relay bypass ensures the unit never colors your audio when disengaged. Taking advantage of this EQ's features means achieving cleaner, more controlled mixes—translating your creative vision into recordings that stand out.