AUX INRCA INOPTICAL INOPTICAL INUSB POWER/SERVICECOAXIALPRE OUTPOWER15V 2.8ALRLRInputOutputSUB OUTLINKCONNECTPLUG-IN MODULE PLUG-IN MODULE7.0 PLUG-IN MODULESThe functionality of the Sound Hub can be expanded by adding one or two Plug-In modules.The modular expansion offers an audio experience fully integrated in the Sound Hub.To add a Plug-In module:1. Make sure that the mains power is removed from the Sound Hub.2. Remove the two screws – one on each side of the Plug-In module cover.3. Remove the cover and carefully insert the Plug-In module until it is flush with the rear of the Sound Hub.4. Lock the Plug-In module in place by reinserting the two screws, being careful not to over tighten.11