Sonos cannot have four surround speakers. The Sonos home theater products, such as the Sonos Arc, are designed to play the front left, front right, and center channels of audio. These speakers are responsible for delivering the main audio content, such as dialogue and music, in a home theater setup.
While it may be tempting to think that adding two additional surround speakers could widen the audio experience, Sonos does not support this configuration. The purpose of the surround speakers in a Sonos home theater setup is to provide immersive sound effects and ambiance, rather than expanding the front soundstage.
Sonos has carefully designed its home theater products to deliver a high-quality audio experience without the need for additional surround speakers. The Arc, for example, features Dolby Atmos technology, which creates a three-dimensional sound field using upward-firing drivers. This allows for a more immersive and enveloping audio experience, even without the use of additional surround speakers.
Adding more surround speakers to a Sonos home theater setup would not enhance the audio experience as intended by Sonos. It is important to note that Sonos products are designed to work seamlessly together, and deviating from their recommended configurations may result in suboptimal performance.
In my personal experience, I have found that the Sonos Arc, along with its accompanying subwoofer and surround speakers, provides a highly immersive audio experience. The combination of the front channels, the subwoofer for deep bass, and the surround speakers for ambient effects creates a cohesive and engaging soundstage.
To summarize, Sonos does not support the use of four surround speakers in its home theater setups. The focus of Sonos home theater products is to deliver an immersive audio experience through carefully designed speaker configurations. Adding additional surround speakers may not enhance the audio experience as intended by Sonos and could potentially result in suboptimal performance.