I have two Play:5s with a Sub Gen 2 and I use them horizontal with Trueplay disabled. Would putting them vertical make any difference to how they sound vs when they are horizontal?
Play:5 Stereo Vertical vs Horizontal Includes Sub

Best answer by Ken_Griffiths
Yes, as mentioned, the Sonos Five/Play:5 speakers do work horizontally, as well as vertically, as a stereo pair. The support documentation says this:
Speaker orientation guidelines
You can place a Sonos Five, Play:5 (gen2) or Play:3 in either a horizontal or vertical orientation.
A horizontal speaker will output stereo audio over a wide soundstage while a vertical speaker will output mono audio/single audio channel. When placing a single speaker, Sonos recommend using a horizontal orientation.
When either horizontal or vertical, make sure all four rubber feet are sitting completely on the flat surface.
I will just personally add to the above with this…
A single vertical speaker will not play in stereo (it’s mono audio only), whereas a single horizontal will have a left/right channel. Two speakers paired in stereo will play in stereo regardless of orientation.
If using the Fives as a stereo pair, then orient vertically with tweeters on the inside for a sharper stereo image, or put the tweeters on the outside for a slightly wider, but possibly more diffuse soundstage.
Hope that helps.
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