The Input Modules are combined with a separate Fader Module. There are Mono-, Inline-, and Stereo-Input Modules and corresponding audio and VCA Fader Modules. The Master Module is mandatory. The range of modules is completed by the optional Control Room Monitor Module, the optional Playback and Talkback Module, and a VCA group master module.

Mono, stereo and inline modules can be installed in any module compartment for input modules. A matching fader module is necessary for the modules. Mono and inline modules need either mono audio faders or mono VCA faders with automation interface. Stereo versions of the audio fader or the VCA fader are used with the stereo input modules. The master modules are installed on the right side of the master frames. If the optional monitor module and playback module is not installed, these compartments can be used for standard input modules alternatively.