Filterbank module with eight fixed filter frequencies, each one octave apart. It is the successor of the RS-210 which was based on a rare 70ies filter bank from EMS. The newer version has different frequencies for a wider frequency range and the filters have a higher slope.
The fixed frequencies are 100Hz, 200Hz, 400Hz, 800Hz, 1.6kHz, 3.2kHz, 6.4kHz and 12.8kHz
Each frequency has a dedicated control attenuating the according filter band. If only one control is turned all the way down, the frequency band will be attenuated -9dB. If all filters are closed then the attenuation is infinite. At maximum position of the control the frequency band´s level is almost unity gain.