A Legend Reborn The T-RackS EQ 81 delivers that legendary British warmth and tone with a few twists. The EQ 81 is based on another classic piece of hardware whose character was instrumental in shaping the sound of many hit songs, the EQ 81 can be considered the evolution of its older brother, the EQ 73. However, there are a few twists that make the EQ 81 capable of delivering a voice of its own. The key here is in the versatility of the EQ section, sporting four independent bands (high / low shelving, plus two midrange peaking filters) rounded out by high and low pass filters this module is particulary useful when a more precise intervention on a track is needed, still maintaining tone and organic, analog warmth in the signal path.