RDL ST-EQ3 3 Band Equalizer - Line LevelThe ST EQ3 features a balanced bridging input, which may be connected unbalanced if desired. The output driver is 150 ohm balanced, and is intended to drive unbalanced or balanced lines of 150 ohm or higher impedance. Equalization is accomplished by three active circuits, each controlling a separate audio band. These bands were carefully selected to yield a module that works effectively in a wide variety of systems. Setup of the ST EQ3 is assisted by