Hi,

I recently purchased an arc ultra, sub mini, and two era 300s. My couch is set against the wall and I cannot bring it forward due to area constraints. I have placed my era 300s on the sides about 6-10 inches behind where my ears would be, approximately 10ft apart from one another. Everything sounds fine but for the upwards firing speakers. I have a slanted ceiling which has a closer proximity to the left era 300 (say 8 ft high) and is higher up from the right era 300 (10 ft high). I am wondering if the trueplay actually takes into account the incorrect reflection of the upwards firing speakers which would not bounce directly down, rather, at an angle due to the slope. To give some background, I have tasted through dolby atmos test tracks and I cannot hear the heigh channel as depicted, it sounds as though it is coming from the top of the speaker and not from above. 

Seeing the posts about inverted mounting and trueplay being supported in the inverted position. Would I benefit by mounting the 300s and inverting them in order to get the height channel heard properly? 

I am not sure whether this would lead to a sacrifice in the left and right firing speakers of the era 300s since the sounds would bounce around at the height at which I mount them (which would be about 2-3 ft higher above from the height of my seated position) or would trueplay properly calibrate the sound? 

I am hoping that I can receive some input from users that have mounted the sonos era 300 about 2-3 feet above their seated position and if that has impacted their listening experience or further improved it. 

Any suggestions on placement would be appreciated as well! Thanks!