It is not possible to use two Sonos Roam speakers as surround speakers. The Sonos Roam is designed to be a portable and versatile speaker that can be used on its own or as part of a multi-room system with other Sonos speakers. However, it does not have the capability to function as a surround speaker in a home theater setup.
Surround speakers are typically used in home theater systems to provide immersive audio experiences by creating a sense of sound coming from different directions. They are usually placed at the sides or behind the listener to enhance the audio effects of movies, TV shows, and games.
While the Sonos Roam can be connected to other Sonos speakers and used in a multi-room setup, its small size and portability make it more suitable for individual use or for creating a wireless audio network throughout your home. It is not designed to provide the specific audio positioning required for surround sound.
If you are looking to create a surround sound setup with Sonos speakers, you can consider using the Sonos Arc or Sonos Beam as your soundbar, along with other Sonos speakers such as the Sonos One or Sonos Five as surround speakers. These speakers are specifically designed to work together to deliver a high-quality surround sound experience.
In my personal experience, I have used Sonos speakers in different configurations, including multi-room setups and home theater systems. While the Sonos Roam is a fantastic portable speaker with impressive sound quality, it is not intended for use as surround speakers.