Can I use the HDMI-In port of Xbox One X to connect to an external speaker?

There is no way available to connect external speakers other than through the HDMI port.

There are a few options to get audio output to RCA (red & white) speakers with the Xbox One.

- If your HDTV has an audio output port for external speakers, usually in the form of a 3.5mm jack or separate RCA outputs, you can configure your TV to disable the built-in speakers and output all audio to what's connected to that output.

- Xbox One has an optical port for digital audio output. Personally, that's how I get my audio going to my soundbar. If your speaker system has an optical port, you might be in luck.

- There are various, specialized adapters you can get online, like HDMI-in to HDMI-out (video) + RCA (audio).

Hope this helps!

This may or may not be related but I just purchased an Xbox One and connected it via HDMI to the same television that I also use as my computer monitor (also connected via HDMI). The external speakers that are connected via coaxial S/PDIF to the television
will play the audio from my computer but not from the Xbox One. Currently I'm having to switch the audio on my television to the built-in speakers instead of the external whenever I'm on the Xbox One source.

Can i use HDMI IN port to send audio to my speaker.

I have HDMI OUT port in my speaker.

There are a few ways you can go about this. The most typical is via an AVR (Audio Video Receiver).

1. HDMI from Xbox to your TV. HDMI from TV to an AVR. Speakers connected to AVR.

2. HDMI from Xbox directly to AVR. For this you'll also need to make sure you have HDMI going from AVR to TV so the video can pass through the AVR to TV.

3. Optical out to AVR.

There is no way to connect external speakers directly to the Xbox. You would need an AVR connected to the speakers and then a connection from the Xbox to the AVR.

If you don't want to go the AVR route;

You can buy an external sound card and connect your speakers that way.

You can use an optical to RCA adapter and plug the RCA adapter into the PC speakers.

You can buy wireless bluetooth speakers if your TV has bluetooth and your TV should output the sound from the Xbox to the speakers.