The RU-EQ2 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 RU-EQ2 has two front-panel knobs. The Q of these low and high band equalizers was selected so that those controls can be functionally considered as a total bass band or treble band control.
A feature unique to the RU-EQ series is the OVERLOAD indicating LED. When audio signals are equalized, the boosted level can cause the output circuit to clip. Unlike many products which show only input clipping, the RU-EQ2's OVERLOAD indicator flashes if either the input or output stage clips.