- Areas of application: quality at a particularly high level. Optimisation of room acoustics. Due to the low weight and the variability of the installation, the room acoustics can be optimised in a targeted manner. Any room resonances can be effectively combated. These depth absorbers are usually positioned behind the speakers. Depending on your needs and room size, they can also be stacked on top of each other to achieve a more precise and drier bass response. This element is stable and can also be used as a design room element.