Sure it's much easier. But you lose your image most times.
Crossfire means pointing them at the opposite listener.
On axis is pointed directly at you.
Off axis is typically how factory cutouts on a door already are.
Edit: I have to chime in on this. One of your refs is Datboiroy //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif:laugh://content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif:laugh://content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif:laugh: