First Watt SIT-3 proper speaker matches


I have a SIT-3. I understand that it mates best with 4 ohm loads. I’m trying to find out if the amplifier is compatible with some 8 ohm loads. I am considering the Focal Kanta speakers that are 8 ohms and dip down to 4. The Focal Sopra 1 have been reviewed well with a 12w Valvet singled end solid state. I know there are other factors aside from impedance and efficiency but I’m not clear on the topic.
5560
Since you already own the amp and in a sense doing this backwards you are going to have to restrict yourself to speakers this amps measured 9 watts into 8 ohms will drive and the floorstanding Focals are not it.  
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What's backwards is that if you don't want to be constricted to in your case a small group of speakers then you pick the speaker first and then find an amp that matches them.  In the case of the SIT-3 the speakers most linked to it would be Avantgarde, Omega and others of that ilk or look at the multiple reviews and find what the reviewers found worked.