Thin sound with floorstand speaker type

Hallo,
Comparing the sound with other amplifiers that i’ ve (Naim, Audio Analogue, Cayin, Arcam, Onyx) my Spendor A7 have a thin and less dynamic sound. Setting floorstand speaker type improves the situation but not yet as the other ampli. It could be possibile to create a curve with more dynamic and fuller sound with bass more deep and articulated?

Thank you

Ps on the paper they have less than half watt of the Hifi Rose but it seems the opposite…