CINEBAR DUETT: Can the Cinebar be expanded with additional (rear) speakers?

With the current CINEBAR DUETT (since 09/2019), an expansion with the devil effect is possible.

An expansion with additional speakers is not provided with the previous soundbar CINEBAR DUETT (2018). However, the CINEBAR DUETT offers virtual surround sound with its Dynamore® Ultra technology with side-firing speakers even without external expansion.