CPU load / RAM usage / disk space reduced

the cleanest frequency response ever

echo bug minimized


Copper2 is a vintage classic graphic EQ plug-in based on Acustica Audio technology. It provides colored, dense, gluing textures to your mixes. It captures all the nuances of a highly appreciated octave graphic EQ and represents, among many applications, the ideal choice for electric guitars.

Each band and preamp has been sampled without any converter / “calibration bias“ phase distortion. This allows to overlap the effect of more bands without adding unwanted coloration, reaching a new level of match with hardware for unparalleled results, even compared to hardware itself. This methodology is named SP Tech.


"Q" range
EQ full range [dB]
±10 with 81 steps (0.25dB circa)
Low Frequency Sliders [Hz]
50, 100, 200
Mid Frequency Sliders [Hz]
400, 800, 1.6K
High Frequency Sliders [Hz]
3.15K, 6.3K, 12.5K
Fixed Butterworth high pass filter can be activated to tame low end below 30Hz (not present in the original hardware unit)
Preamplifier (switch selectable)
10 harmonics
In Trim range [dB]
Out range [dB]
Sample rates
Copper2 is designed to provide the same sound quality at each of the following sample rates: 44.1KHz, 48KHz, 88.2KHz, 96KHz
SP Tech


HD Gallery

Frequency Response @44.1KHz