Bass: Adjusts the gain for the bass band between -15 db and +12 dB.
The bass band was designed to be adaptive: at higher boosts or cuts the turnover-frequency moves upwards towards the midrange and the slope changes to produce a more powerful, broad effect. At the upper range of cutting the slope changes from that of a shelving EQ towards that of a high-pass filter.
This EQ has been modeled exactly. The 0 dB gain setting still provides the natural EQ color as the signal still passes through an inductor and transformer-rich signal path.
Mid: Adjusts the gain for the middle "presence" band between -8 db and +8 dB. The original PEV units only allowed mid boost, our plugin allows both boost and cut.
The available center frequencies for the presence band are 700 Hz, 1 kHz, 1.4 kHz, 2 kHz, 2.8 kHz, 4 kHz and 5.6 kHz.
The middle-band was designed to have an adaptive Q: the boost or cut is quite broad at lower gain settings and narrows as more boost or cut is applied. This adaptive effect is more pronounced with the higher frequency settings.
Treble: Adjusts the gain for the treble band between -15 db and +12 dB.
The treble band was also designed to be adaptive: at higher boosts or cuts the turnover-frequency moves down towards the midrange and the slope changes to produce a more powerful, broad effect. At the upper range of cutting the slope changes from that of a shelving EQ towards that of an extremely unobtrusive low-pass filter.