Sonos 3 Speaker.....

@kenjit 

Re your link..thx for sending!

This performance is one that the designer of a $3,000 per pair speaker could be proud of. On-axis, it measures ±2.7 decibels. Averaged across the listening window, it's ±2.8 dB. This means that on-axis and off-axis performance are both superb and that the Play:1 should sound pretty good no matter where you place it in a room.

@kenjit 

I have a Play 3....just a single in our living room.  I just thought I would post because I am surprised at how good it sounds...easy on the ears and I mean try not to look at the speaker when facing or close your eyes and its quite good.

I have heard some sonos speakers but not in stereo.

https://www.lifewire.com/sonos-play-1-measurements-4103874

According to these tests, the sonos play 1 has perfect measurements.