SteveR750 said:
Useful if you live on a large estate and like listening al fresco in the bottom field. It's alos frequency dependent, since most speakers impedance changes with frequency, so higher figure means less tonal changes with different speaker impedance profiles. Make mine a caramel latte Vlad!
Pro power amps have very high DF (in thousands) just so they can breach long distances without much affecting the original FR. These are distances of sometimes 50m-100m. For domestic amps the old pro amp trick to get higher DF is to use smaller filter caps in the PSU but in larger numbers paralleled so they reduce the impedance. The Exposure 1010s2 and Creek Evo 50A employ this trick at the budget level, which is a sign of good design.?