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EQ will never be the same again
Kirchhoff-EQ is the ultimate 32-band parametric EQ plugin, built for critical professional applications. It features refined sound quality, analog modeled curves, ultra-low distortion dynamics processing, 15 filter types (with continuously variable shape) and 32 vintage EQ types that emulate real-world devices.

The ultimate in sound quality
With its "Robust Nyquist-matched Transform", Kirchhoff-EQ has made its digitally modeled frequency response more closely match its analogue counterparts, without the high frequency “cramping” found in regular IIR (infinite impulse response) equalizers.

High-precision processing
Sporting 64-bit operation by default, Kirchhoff-EQ uses a technique called "Double-Double" to make the precision of internal processing reach 117 bits! This is the first equalizer in the world to reach such precision. A technology called "Psychoacoustic Adaptive Filter Topologies" allows filter structures to intelligently change themselves to their "best fitting" state, resulting in optimized sound quality without tradeoffs in low or high frequencies.

A full palette of analog and digital filter types
Kirchhoff-EQ includes 15 unique filter types from conventional low pass, high pass, bell and shelving filters to more esoteric flat tilt, flat top and “sword” filters. Take advantage of 9 precisely matched vintage EQ models and fully variable EQ points not found in the analog domain.

Selectable phase modes
To meet all your phase relationship needs, the phase mode of Kirchhoff-EQ is switchable between zero-latency mode, analog mode, linear phase mode and an ingenious mixed phase mode that uses zero-latency when the band frequency point is low, and uses linear phase when it is high.

Deep and powerful dynamic EQ capabilities
Dynamics processing in the Kirchhoff-EQ are not just a bonus—they provide some of the richest dynamics features you have ever seen. With two-way thresholds, adjustable “onset” control and a relative detection option, you can do things other EQs simply can’t: Simultaneously compress and expand to help “stabilize” a given frequency. EQ transients separately from body. Or, effectively sidechain one frequency band to the dynamic activity in another. Even the vintage-modeled curves can be applied to the dynamics processing.

Endless features and intuitive operation
Kirchhoff-EQ has every feature you could imagine in an EQ including spectrum grab, oversampling, lookahead, mid-side processing and monitoring, stereo width, global EQ scaling and more, all optimized for ultra low CPU workload.


  • Exhaustively feature-rich EQ with 32 bands and 15 unique filter types
  • Precise models of 9 vintage hardware EQs
  • Robust dynamics processing with two-way thresholds, relative detection mode and onset adjustment
  • 5 selectable phase modes
  • Oversampling, lookahead, global gain scaling, mid-side processing, stereo width control, high bit precision, and more

Audio Examples

Industry Reviews

  • Michael Brauer

    Michael Brauer

    7 Grammy Awards (Coldplay, John Mayer, The Rolling Stones)

    I was not expecting to have the Kirchhoff-EQ sounding so musical. Usually graft EQs are more like a surgical tool and very transparent. This plugin had a lotta warmth and punch if I chose it or… Read More

  • Paul

    Paul "Willie Green" Womack

    The Roots, Wiz Khalifa, ScHoolboy Q

    The Kirchhoff is a do-it-all EQ. It's incredibly customizable and light on the CPU. Use it everywhere!

  • Neenah


    Multi-platinum mixing engineer

    The sound, intuitiveness, and precision of this EQ are very impressive. I love that I can easily get to the exact place I want with it without much effort at all and without creating unwanted… Read More

  • Maria Elisa Ayerbe

    Maria Elisa Ayerbe

    Multi-Grammy & Latin Grammy nominated Engineer

    Kirchhoff's EQ offers a variety of possibilities rarely found on a single plugin. From surgical cuts to musical boosts, this EQ will be part of your everyday toolkit.

  • Skyler Gibbons

    Skyler Gibbons

    Recording engineer (Syko, Lil Wayne, Moneybagg yo)

    After some time with the plugin, I am extremely happy with the sound and versatility! You guys nailed it again. It’s quickly replacing EQ plugins that I’ve had in my sessions for years. I’m… Read More

Customer Reviews

  • Best EQ on the market

    by sobrinN
    It really is the best eq in the market right now! It has every feature we look for in a eq and it's low on cpu. I love it, please keep it updated always!
  • Awesome

    by CLNyc
    I love this EQ. Adding compression and expansion to each band is super helpful and easy. Great that the UI is sizeable. One of the best plugins I purchased in a while!
  • Spectacularly good!

    by Ken W.
    I didn't think there was a EQ that could trade blows with E******rium and ***-Q . I was wrong!
    This thing has a very swift and pleasant workflow, it's very easy to make fine tuning, and make… Read More
  • Amazing EQ

    by Defying Silence
    This EQ is simply amazing the more I have been messing with it in a new mixdown. I loved Fabfilter Pro Q 2 which is a great EQ, but now it is permanently retired. The Kirchhoff EQ allows so much… Read More
  • Replaced Pro-Q³ for me

    by FMN
    but please don't take too much longer to fix the numerical display of the output gain (in v.1.60).
    This bug is a bit concerning because the knob and the display seem to clash and I'd… Read More


Supported Plugin Formats
AAX Native, AU, AAX AudioSuite, VST2, VST3

Supported Operating Systems
macOS 12 down to macOS 10.11
Windows 11 down to Windows 8

Intel, or Apple Silicon (except for AAX) architecture

x64-compatible CPU

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


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