JBL Omni Bar Plus

No, since the OMNI BAR+ does not have any HDMI input connections, it is only your source, connected to the TV, (and of course your TV) that need to be 4K compatible.

Yes, press and hold the Surround button on the OMNI BAR+ until it starts to blink amber. You are now in pairing mode. Press Volume+ on your OMNI BAR+, then press Volume+ on your remote control. The surround button will quickly flash white, to indicate it has learned Volume+. Repeat for Volume-, and Mute, and then hold down the Surround button to exit remote control learning.

There is a reset button on the bottom of the Omni+ devices. Press and hold this button for 5 seconds to perform a factory reset of your product. All product settings, Wi-Fi, and Bluetooth connections will be erased. To reset the OMNI 50+ speaker, please do the following: First, press & hold ‘Source’, ‘Vol+’, ‘Vol-‘ buttons at the same time. The Omni 50+ will switched off, indicating that the product was successful reset. Secondly, press ‘power' button to turn on power for the Omni 50+ speaker. Now you can easily set up the product again for your home Wi-Fi network.

On the back of your OMNI BAR+ there is a reset button. Hold it down for 5 seconds, until the round button LED lights up in white. The product is now reset and ready to be set up again.

Please make sure that your smart-device that is using the HK Controller app and OMNI speaker(s), are connected to the same band (2.4G or 5G) when using a Dual-band router.

Close and restart the Google Home app, or restart your phone. Start the Google Home app again, and the speaker should now appear.
 

The OMNI BAR+ as standalone system is 2.1, however when using it in a 5.1 wireless surround system, it generates a virtual acoustic center speaker to complete the 5.1 Surround system. In that combination it will be a 3.1 system.

One explanation can be that your OMNI 50+ is part of a 5.1 system with your Omni Bar, which will make the surround OMNI 50+ left and right rear speakers act as "secondary", and Bluetooth connection is not possible to secondary speakers. To use the OMNI 50+ as a portable speaker again, simply perform a reset of the speaker by pressing the reset button for 5 seconds. Please note that after resetting your OMNI 50+, it is no longer part of the 5.1 wireless system.

Do not worry, pairing both devices is easy and quick. Press the "pairing" button on the back of the Omni Bar, then press "pairing" button on the subwoofer. They will start communicating with each other, and when both devices show white light in the LED on the back, that indicates that they are paired.

No, that is not possible. However, you can create a 5.1 wireless surround system to extend your TV or movie sound. All you need is two additional OMNI+ speakers, such as 2 x OMNI 10+, OMNI 20+ or OMNI 50+.