If you want to use the arc output function, You can connect the HDMI (ARC) port on your TV with the HDMI (ARC) out port of the UD951B, and then set your TV to play on the external speakers, or turn on the arc function. At this time, there will be no sound from your TV speakers, and the sound will be output from the arc. And your TV box connects directly to your TV via another HDMI cable. UD951B switches to arc input mode. The LCD will display "ARC".
 

You also can connect your TV box with the HDMI 1(or 2 3) of the H951BT, then connect the TV via the HDMI (ARC) out port of the h951bt, and connect the power amplifier and speakers via 5.1CH or COX/OPT. In this way, you can play video and sound at the same time.


Please refer to the following two modes for connection: