The mix is precise and lively, with plenty of well - placed effects that go on the move in rear channels, contributing to an immersion alive with ambience. (grouchoreviews.com)
Music and atmospheric effects are mostly kept to the front channels, with a small amount of rear channel activity. (dvdtalk.com)
Maybe because they wanted to make sure you could only use Play 3's or some newer speaker as rear channels! (thewirecutter.com)