I have Sonance 623R in-ceiling speakers. I use these as surrounds in a 5.1 system with Ascend RAAL Towers and a Sierra-1 NrT Center. (...I know in-ceiling speakers are not ideal, but it's what I have to work with.)
I can aim the woofer and tweeter individually. I'm wondering if it's recommended to aim the speakers directly at the listening position, or aim it at the back wall "to get a more diffuse sound", as the manual describes it.
A lot of my listening it 2 channel music. The in-ceilings are only used for blu-rays.