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TBTech Kirchhoff-EQ (Windows)


System Requirements

  • Windows 10,11.
  • 64-bit VST2,VST3, AAX


Kirchhoff-EQ is an ultimate 32-band parametric EQ plugin built for all critical professional applications. It has refined sound quality, analog-matched curves, 15 filter types with continuously variable shapes,s and 32 vintage EQ types modeled from real-world devices. The built-in dynamic processing functions are highly flexible and have ultra-low distortion. All these push Kirchhoff-EQ to a next-generation standard.

Ultimate Sound Quality
Robust Nyquist-matched Transform

Though originally developed “Robust Nyquist-matched Transform”, Kirchhoff-EQ has made digital-domain frequency response more approximate to its analog counterparts without high-frequency cramping as in regular IIR (infinite impulse response) equalizers. This technique is applied to all filter types in Kirchhoff-EQ.

High-Precision Processing
64-bits is mandatory and it’s not negotiable. The internal processing of Kirchhoff-EQ is always in 64 bits, regardless of the host DAW’s current working precision.

Psychoacoustic Adaptive Filter Topologies
All linear filter structures should have the same sound on paper. However in real-world applications, round-off errors make every filter structure sound differently: some better in low frequencies, some better in high frequencies. A technology called “Psychoacoustic Adaptive Filter Topologies” has been deployed in Kirchhoff-EQ. Filter structures change themselves to a “best fitting” state along with corresponding band frequency changes, resulting in optimized sound quality in both low and high frequencies.

Switchable Ultra-High 117-bits Processing
Since there are already 64 bits, why not go further? 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. You can switch between 64-bits and 117-bits at any time. It satisfies the most demanding ears.

15 Unique Filter Types

  • low pass, high pass, band pass: continuously variable from 0 dB/oct to 96 dB/oct;
  • bell, notch: continuously variable from 12 dB/oct to 96 dB/oct;
  • low shelf, high shelf, tilt shelf: continuously variable from 6 dB/Oct to 96 dB/oct;
  • flat tilt and flat top;
  • sword: has a sharper slope than the bell, specifically designed to “dig” out resonances.
  • brickwall low pass, brickwall high pass, allpass low and allpass high.


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