@Mike_Trueman
Ok let's say that the card is correct even if it only reports the WPC values.
I'll give you an example:
Nad ma10-V3 Wat 100 (measured 151)
Evo 150 Wat 152
Rose RS520 Wat 250
I mention these amplifiers because they are the only ones that interest me, in reality we must also consider the amount of current called with the name, of "Ampere" that comes out and not only the Wat, so
Nad M10-V3 I can't find data.
Evo 150 declares 14.4 Ampere
Rose RS520 declares 10 Ampere (found on a forum online).
From this point of view Evo 150 despite declaring only 150 Watt of power, in reality it is the best as it has almost 5 Ampere more than the Rose therefore more current to manage the speakers, I have no idea about Nad but I assume he also has 10?
Sorry if I went off topic, but if this data is real the Cambridge is the best overall among these 3 models and has a cost of 1500 euros less than the Rose.
Is it worth it?