The Samsung Soundbar "HW-Q990C" offers several connection options that make it easy to connect multiple devices and switch between them without having to re-pair each time.

### Bluetooth and WLAN connections
- The soundbar supports Bluetooth, which makes it possible to pair multiple Bluetooth devices and switch between them. However, the number of simultaneously connected Bluetooth devices is usually limited, typically to two or three devices.
- A more practical solution could be to use Wi-Fi. With the Samsung SmartThings app, you can connect the soundbar to your Wi-Fi network and use multiple devices over the same network. This makes it possible to connect multiple sources such as PCs and mobile devices and switch between them without having to re-pair each time.

### Multi-device connection via SmartThings app
- The SmartThings app supports the connection of multiple devices to the soundbar, making it easier to switch between different sources such as PCs and mobile devices without the need for re-pairing.

### Further connection options
- In addition to Bluetooth and Wi-Fi, you can also use wired connections such as HDMI or optical cables to connect devices. However, these connections are less flexible when it comes to switching between multiple sources.

Overall, the Samsung Soundbar "HW-Q990C" offers a good solution for connecting multiple devices and switching between them without having to re-pair each time thanks to the combination of Bluetooth and, in particular, Wi-Fi connections via the SmartThings app.