The F7 is a fine amp, it’s going to be a bit of a gamble, depending how quite you listen, it’s only 20w into 8ohm and still only 30w into 4ohm, I think you’ll reach it’s limit very early before you get to medium/loud level.
The Sofia 2’s are 88db not an evil load, but not easy either.
The speaker’s impedance drops to a minimum value of 3.26 ohms at 220Hz. This is upper bass where a lot of power is needed.
https://www.stereophile.com/images/archivesart/Sopfig1.jpg
Think they'd be happier with the Conrad Johnson Premier 12 Monoblocks 140w version you were talking about in other posts
Cheers George
The Sofia 2’s are 88db not an evil load, but not easy either.
The speaker’s impedance drops to a minimum value of 3.26 ohms at 220Hz. This is upper bass where a lot of power is needed.
https://www.stereophile.com/images/archivesart/Sopfig1.jpg
Think they'd be happier with the Conrad Johnson Premier 12 Monoblocks 140w version you were talking about in other posts
Cheers George