Ideally, the soundbar is connected to the TV via HDMI (eARC/ARC) or optical cable. For a completely wireless connection between the TV and soundbar, you can use Wi-Fi or Bluetooth so that only the soundbar and the four speakers (subwoofer and rear speakers) each need to be supplied with power cables. The rear speakers and subwoofer connect wirelessly to the soundbar, so no additional audio cables are required for these speakers. Only the soundbar itself requires a connection to the TV, either wired (HDMI/optical) or wireless (WLAN/Bluetooth).