The best EQ plugin ever made — FabFilter Pro-Q 4 delivers spectral dynamics, EQ Sketch, 24 bands, and surgical precision that justifies every penny of its price tag.
| Type | Linear phase & minimum phase EQ |
| Bands | Up to 24 EQ bands |
| Spectral Dynamics | Yes — frequency-specific dynamics |
| EQ Sketch | Yes — draw EQ curves naturally |
| Sidechain | Yes |
| Stereo Modes | Stereo, M/S, Left/Right, Mid, Side |
| Formats | VST3, AU, AAX, CLAP |
Pro-Q 4 adds Spectral Dynamics — the ability to apply dynamic EQ across the entire frequency spectrum simultaneously. Rather than broadband compression, you attenuate only the specific frequencies that are too loud, only when they are too loud. A dramatically more surgical approach that produces more transparent, natural-sounding results.
Draw the EQ curve you want using your mouse, and Pro-Q 4 automatically creates the appropriate combination of bands to approximate your sketch. It's intuitive, fast, and removes the technical barrier between creative vision and EQ settings. Particularly useful for corrective EQ on complex signals.
FabFilter's EQ algorithms are among the most transparent available. In minimum-phase mode, the Pro-Q 4 sounds essentially inaudible — applying only the intended EQ change without sonic side effects. For mastering and critical mixing, this transparency is essential.
Every serious producer and mixing engineer. The Pro-Q 4 is the EQ that professionals reach for first on every session. Whether doing corrective EQ on a problematic recording or creative tone shaping on a synth, the Pro-Q 4 handles it with unmatched precision.
The FabFilter Pro-Q 4 is the standard against which every other EQ plugin is measured. Spectral Dynamics, EQ Sketch, 24 bands, and transparent processing make it the most powerful and versatile EQ available. The price is justified by the quality. If you are serious about mixing, the Pro-Q 4 is not optional.