RB500ME is a stereo passive equalizer packed into a double 500-series module. This beast is equipped with transformer balanced inputs (Carnhill) and outputs (Edcor) as well as a class-A driver circuit. Of course the entire filtering section is passive and it mirrors analogue equalizers from the 60s. There is separate frequency selector for low cut and boost sections. Top quality potentiometers and ELMA switches were used to achieve outstanding performance.