Dual Para EQ

The dual para eq is a compact, parametric 2-band-equalizer, 

which you can apply to a signal chain to lift or lower certain frequencies. 

Parametric means not only lifting or lowering, but also adjusting separately position and width of frequency bands.

Thus, on the one hand, it offers the possibility of equalizing frequency error (hence the name equalizer) and suppressing feedback or resonance peaks. On the other hand, it can serve as a flexible sound control of the targeted sound change.