Some Teufel Soundbar models can be expanded with additional rear speakers.
These include:
> CINEBAR PRO>
> CINEBAR ULTIMA>
> Soundbar TRIOS
> CINEBAR DUETT (only versions with E in serial number)
> CINEBAR LUX.
Note: Soundbars from Teufel usually already have integrated virtual surround sound technologies, so that a (home cinema-typical) surround sound can be experienced even without rear speakers.