When amplifiers are being discussed, quite common their ability to drive low-impedance or difficult speakers pops up. \nIs there a way to tell that a given amplifier or AVR can or cannot drive given speakers "properly"?\n\nTake my example: I have Focal Aria 948 on front, Focal Aria 900 CC center, Focal Chorus 706 as surrounds, no sub. I use AVR NAD 758 v3. I listen to music at around -30...-15 db depending on recording, movies and games are about -25...-20 db.\n\nAria 948 impedance drops to less than 3 ohms and in reviews it's considered to be a "difficult load" for amplifiers.\n\nBut can I tell somehow if my NAD is totally fine OR I need to add e.g. external power amplifier for fronts? Especially since I don't use sub.