A five-band dynamic equalizer with per-band compression or expansion, tube and Class-A coloration, triode distortion, and an analog-style envelope detector.
Purpose
The 590 Dynamic EQ is a five-band equalizer that applies dynamic processing to each band, allowing gain to respond to the input level rather than remaining static. Its envelope detector is based on an analog circuit, delivering a response that feels smoother and more controllable than typical digital designs.
Each band can be set to compress or expand, with attack and release times adjustable up to substantial durations. This makes the unit suitable for taming resonant frequencies, adding movement to static tones, or creating expressive dynamics across a mix.
Key capabilities
The unit offers two dynamic response styles: a slope mode and a ratio mode, letting you choose between subtle and aggressive behavior. Bands also include a Colour control derived from the Musiqual EQ series, which applies filter sets to enhance harmonics and subharmonics around the selected frequency.
The lower two bands use a Tube-inspired coloration that tends to push sounds back in the perceived depth of field, while the upper three bands use a Class-A style that brings sounds forward. A separate Distortion control emulates triode vacuum tube harmonic distortion, adding analog character without extra gain staging.
Workflow
In typical use, you identify problematic frequencies in a track and set each band to compress or expand as needed. The attack and release times can be adjusted to follow the material’s tempo, and the slope or ratio mode tailors the response to your taste.
The Colour and Distortion controls can be applied per band, allowing you to shape timbre while equalizing. For example, adding Tube coloration to bass frequencies can create a warmer, more subdued low end, while a touch of Class-A color on high frequencies adds presence. Distortion can be dialed in to add grit or warmth.
Practical applications
This dynamic EQ excels at controlling resonances in vocals or instruments without the pumping artifacts of a full-band compressor. It can also add movement to static synth pads by expanding certain bands, or create subtle analog-style coloration across a mix bus.
In mastering, you might use it to gently de-ess a vocal track or tame harsh highs. The presets and A/B comparison simplify experimentation, and custom presets are stored globally for reuse across sessions. Its double-precision processing with oversampling ensures clean arithmetic, though the sonic effect remains warm and analog-inspired.
Key features
- Five-band dynamic equalization with compression or expansion per band
- Envelope detector based on an analog circuit for smooth response
- Tube and Class-A coloration controls per band
- Triode distortion emulation with adjustable amount
- Slope and ratio modes for dynamic response shaping
- Preset management with A/B comparison and custom preset storage
Best for
Musicians and engineers seeking a dynamic EQ that combines frequency control with analog-style coloration and distortion, particularly for adding movement or taming resonances in individual tracks or mixes while retaining a musical, tube-like character.