I have been listening off-axis for more then 35 years. As ozzy62 said most horns do have good off-axis response. My speakers are not current, they are 37 years old and have 100x100 degree V and H dispersion. As has been said, Ohms also have good off-axis response. example: Ohm model F. Never listened to Magico's so cannot comment regarding. The most current I have listened to are the JBL M-2 monitors
Mike :-)