How do I connect my surround sound to my Xfinity X1 box?
Daniel Foster
Published May 08, 2026
How do I connect my surround sound to my Xfinity X1 box?
Enabling Dolby ATMOS on X1 Once you have connected your Dolby ATMOS compatible stereo system to your X1 TV Box via an HDMI cable, visit Settings > Device Settings > Audio > HDMI Audio Output and select Expert Mode.
How do I hook up my cable box to my receiver?
Connect the satellite (or cable box) to the AV receiver. Connect one end of another HDMI cable to the satellite receiver (or cable box) and connect the unused end of that cable to the TV/SAT HDMI input on the AV receiver (or simply choose any free HDMI input on the AV receiver).
How do I hook up my Comcast receiver to my surround sound system?
Connect the Comcast receiver’s HDMI port to the HDMI port on the surround sound system’s receiver or with a HDMI cable. Turn on the Comcast receiver and the surround sound system’s receiver. Select the channel that the Comcast receiver is connected to on the surround sound system’s receiver.
How do I hook up my Comcast cable box to my TV?
Change your TV’s input if necessary. Press the “Input” or “Source” button on your TV or remote to switch to the input (e.g., HDMI 1) into which you plugged your Comcast box. Set up your Comcast remote. Insert the batteries into your remote, then proceed with connecting it to your TV and cable box.
What kind of cable do I need for Chromecast Audio?
Chromecast Audio. This unit comes with the same AC adapter, and rather than a HDMI cable, has a 1/8” connection. This doesn’t lend itself to connecting to all receivers, so may need to have a 1/8” connector to stereo RCA cables or an optical cable in order to connect the Chromecast Audio to your receiver.
How do I hook up my HDMI receiver to my TV?
Plug one end of the receiver’s optical or HDMI cable into the appropriately labeled port on the back of the receiver, then plug the other end of the cable into the optical or HDMI port on your TV. If your receiver is old enough, you may end up using RCA cables to attach it to the TV instead.
Connect the Comcast receiver’s HDMI port to the HDMI port on the surround sound system’s receiver or with a HDMI cable. Turn on the Comcast receiver and the surround sound system’s receiver. Select the channel that the Comcast receiver is connected to on the surround sound system’s receiver.
Change your TV’s input if necessary. Press the “Input” or “Source” button on your TV or remote to switch to the input (e.g., HDMI 1) into which you plugged your Comcast box. Set up your Comcast remote. Insert the batteries into your remote, then proceed with connecting it to your TV and cable box.
What kind of audio connection does Comcast use?
If offers the lowest audio and video quality. A coaxial interconnect will give you very low audio quality. It can only provide mono (a single audio signal for left and right speakers) sound with no ability to provide stereo (separate audio signals for left and right speakers) sound.
Chromecast Audio. This unit comes with the same AC adapter, and rather than a HDMI cable, has a 1/8” connection. This doesn’t lend itself to connecting to all receivers, so may need to have a 1/8” connector to stereo RCA cables or an optical cable in order to connect the Chromecast Audio to your receiver.
