Precise bass fundament
The Sub-modules as well as all the other Silbersand speakers are sensor controlled, active energized and with a single power supply versatile usable.
With one or more modules, the Sub-modules enhance an existing stereo or surround installation and of course they are a part of the Silbersand module system.
FM Sub1M to FM Sub3M are system recommondations and other combinations, with even more than three modules, are possible.