I have been using this speaker for about 3 days now. I have a Yamaha amplifier which splits the sound into 5.1 channel sound and plays it back. The film material is stored on a USB stick and saved in 5.1 Dolby Surround Sound (DTS). My question about the box would be: Is it possible to watch films in 5.1 DTS via the box from a USB stick? Unfortunately it is not possible via the passthrough function, only stereo is available. Many thanks for your help.