X350.8 consumes 600w at idle. The amp will run hot.
But…you buy an amp or a preamp for sound quality. If you’re worried about heat, may be install an air conditioner first. If you prioritize sound quality over a little bit of extra heat, you’ll find a way to cool your ass off.
I’m actually questioning the whole thing here. Whatever amp you get, these focal sopra 1s will never sound good playing the music you’re listening to the most. Throw some blankets over them and add a sub.

