Leo,

The surrounds are designed to be ‘behind the head’ and not bouncing or reflecting off the walls. If you can’t hang them on the wall behind your viewing area, I’d recommend some stands to hold them up. Putting surround speakers in the same plane as the front Ray won’t be good. 
 

Leo,

Los altavoces envolventes están diseñados para estar detrás de la cabeza y evitar que reboten o se reflejen en las paredes. Si no puedes colgarlos en la pared detrás del área de visualización, te recomiendo unos soportes para sujetarlos. Colocar los altavoces envolventes en el mismo plano que el Ray frontal no será una buena idea.

So for this specific problem I have no solution, because the stands isn't in stock in the stores I went to look for it, and they will be unavailable until like 2 weeks, for that time I will be already moved, so I only search a temporal solution :)

You can purchase stands directly through Sonos, if desired. Delivery isn’t overnight, though. I’ve occasionally, in the past, ordered through Amazon.com, when speed was important. I’ve also used side tables as ‘stands’ for quite a long time, for surrounds, while figuring out what the final resolution should be. Not ideal placement for surrounds, which should be at head level and behind, but it worked for me, temporarily. 
 

Puede comprar soportes directamente a través de Sonos, si lo desea. Sin embargo, la entrega no es durante la noche. De vez en cuando, en el pasado, he pedido a través de Amazon.com, cuando la velocidad era importante. También he usado mesas auxiliares como "soportes" durante bastante tiempo, para los alrededores, mientras averiguaba cuál debería ser la resolución final. No es una ubicación ideal para los alrededores, que deberían estar al nivel de la cabeza y detrás, pero funcionó para mí, temporalmente.

Ah, I remember at one point, I was using IKEA CD ‘racks’ stood on end to support my surrounds. A bit tall, but serviceable for the PLAY:1s that sat on them. Let me see if they still make them, if so, I’ll put the link here in the English statement, not in the Apple generated translation. 
 

Apparently they don’t (it has been quite a few years, unfortunately, but they were something like this, but smaller in dimension, about 6x6x72…ummm, that’s inches. 
 

Ah, recuerdo que en un momento dado, estaba usando "racks" de CD de IKEA para soportar mis envolventes. Un poco alto, pero útil para los PLAY:1s que se sentaron en ellos. Déjame ver si todavía los hacen, si es así, pondré el enlace aquí en la declaración en inglés, no en la traducción generada por Apple.

Aparentemente no lo hacen (han pasado bastantes años, desafortunadamente, pero eran algo así, pero más pequeños en dimensión, alrededor de 6x6x72... ummm, eso son pulgadas.

I've seen it too (maybe not the same "racks" but yes they now don't make them) but thank you for the solution, here in Mexico we can't buy directly from the Sonos page but apparently Sonos is very nearby to Amazon so they have fast delivery for its products, I'm gonna look for the stands on Amazon, maybe I can receive it before I move (I see that here the most of people buy the speakers in black but for my room I like more white so, all my room speakers are white but they take longer to send. Inclusive my Era 100 take almost a week to arrive). Thank you for the temporary solution idea :)

I have a mix of black and white…most of the white ones (except the Arc) have ended up in bathrooms. It’s, as near as I can tell, just a matter of preference.