I can't speak for the Focal's but I did own the B&W Signature 805.A great sounding speaker if you give it enough juice. I was poweringmine with a pair of Manley Snappers that had the Triode option. In Ultra-linear mode they put out 100W and all was good. In triode mode itwas about 33W and you lost a lot. For folk and small jazz it was fine but the drop in dynamics and volume was significant. As wonderful as a 300B amp can be I'm not sure either of these would be the best choice.
