I happen to have focal Sopra 2 speakers 91db efficient at 8 ohms
I have a 45wpc Pathos inpole integrated amp 45wpv 8 ohms and 75 wpc into 4 ohms my room is big 30x 16x8 but I only sit 11 feet from them .itcan playinto 95db peaks it weighs 86 lbs and a dual mono design .the question is how often do you need to play a tear damaging level ? In class A it does get warm over 100 degrees sonically superior to class AB and the Patented Inpol technology it uses the 4 vacuum tubes for again stage to power the speakers as well as to the resistor ladder preamp section , and has dual linear power suppliesforthepreampsectiin to big inductor transformers ,Mosfets, then potted torroidal transformers to the output section . For me it’s plenty loud and very tunefull and detailed Pathos makes a great hand built product from Italy.