zniff :
so if the specifications mention DNR on one product and SnR on another one and show 122db wich is better or is it a trick to sell a product that seems very the same
Ideally you want something with both a good SNR and a good DNR, although of the two, I will take DNR, as poor DNR makes everything sound a bit flat and boring; poor SNR only really rears its head at eardrum breaking sound levels.
But then, I am from the LP generation, I am used to a bit of hiss.