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Para EQ
Headrush Dynamics & EQ

Para EQ

Inspired by Avid® Custom Parametric EQ (Eleven Rack)

It is a fully adjustable 4-band parametric equalizer that is the most precise of the HeadRush EQs.

GENERAL FUNCTION

Total control over:

  • frequency (Freq)
  • gain (Gain)
  • bandwidth (Q)
  • filter type (Type)

Used for:

  • surgical correction
  • sound design
  • professional mix

STRUCTURE

4 independent bands:

  • Band 1
  • Band 2
  • Band 3
  • Band 4

Note:

  • In HeadRush some bands (e.g. 1 and 4) can have multiple types (shelf/HPF/LPF etc.)

Control Parameters

Gain 1–4dB
  • Typical range: −12 → +12 dB
  • Controls band boost/cut

Effect:

  • positive → emphasizes frequency
  • negative → attenuates
Freq 1–4Hz
  • Range: ~20Hz – 20kHz
  • Select the center frequency

Most important parameter together with Gain

Q 1–4
  • Range: ~0.1 → 10+

Meaning:

  • Low Q → wideband (natural)
  • High Q → narrow band (surgical)
TYPEFILTER TYPE

Defines the behavior of the gang

Shelf

  • Low Shelf (low) or High Shelf (high)

Effect:

  • changes all frequencies above/below the threshold

useful for:

  • general tone shaping

Peak

  • Classical bell (parametric)

the most used

6 dB / 12 dB / 24 dB

  • High-pass or low-pass filters (depending on band)

Difference:

  • 6 dB: soft
  • 12 dB: medium
  • 24 dB: aggressive

higher = cleaner cut

Notch

  • Ultra narrow band

used for:

  • eliminate specific frequencies
  • feedback

Pro Tips

  • excessive boosts → artificial sound
  • High Q + boost → unnatural effect

Use:

  • Q low → musical
  • High Q → correction

Professional workflow:

  • HPF (low cleaning)
  • Notch (remove problems)
  • Cuts (mud/harsh)
  • Boost (character)

Quick Reference

  • Gain 1–4: boost/cut
  • Freqs 1–4: frequency
  • Q 1–4: bandwidth
  • Type: filter type

Setup Examples

Professional voice

Band 1HPF (80–100 Hz, 12 dB)
Band 2−3 dB @ 300 Hz (medium Q)
Band 3+2 dB @ 2 kHz
Band 4High Shelf +3 dB

Clean and shiny

Acoustic guitar

Band 1HPF 80Hz
Band 2−3 dB @ 250 Hz
Band 3+2 dB @ 3 kHz
Band 4shelf +2 dB

Natural

Anti-feedback (live)

TypeNotch
QHigh
Gain−6 / −12 dB
  • sweep freq until it disappears

Classic use

Warm sound

  • Low shelf +2 dB
  • High shelf −2 dB

Softer