The RUEL R+ is designed to be as wide and smooth as possible on all frequencies.
On top of using small drivers, the R+ uses a diffraction slit.
This diffraction slit allows to get a wide 180 degrees dispersion in the high frequencies.
And because the system is designed to be placed against the back wall, the low frequencies dispersion is also limited to 180 degrees.
The R+ is more than a linear dispersion system.
It is a constant dispersion system.
Because of this wide dispersion, the speakers don't need to be angled or toed in.
Also, the shape of the cabinet itself is round to get minimal diffraction.