The RU-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. Front-panel knobs provide active equalization, each controlling a separate audio band. These bands were carefully selected to yield a module that works effectively in a wide variety of systems. Each band's center frequency can be either boosted or attenuated by at least 12 dB. The...