The Tierra Audio Icicle Equalizer is a single channel, four-band EQ with a choice of clean or coloured sound with Germanium Diodes distortion. 

The Tierra Audio Icicle Equalizer includes a high-frequency section with a maximum frequency of 29.4kHz allowing for the addition of air and presence without the harshness or sibilance that can occur otherwise.

The Icicle EQ can be used to enhance the sound or for surgical applications, removing unwanted frequencies with pinpoint accuracy. 

The Colour knob (called Clean/Oomph) lets you choose the amount of the desired distortion, adding anything from the subtle colouration of tape recordings to more pronounced distortion effects, particularly suited for drums, bass and synths.