I agree with you. I never comment on equipment I haven't heard. Now I may comment on the musical philosophy of a particular company(each audio manufacturer emphasis certain aspects of audio reproduction over others because no one piece of equipment can do it all). An example would be Nordost. I find their cables to be on the analytical side; however I have not heard every cable in their line so it would be inappropriate for me to comment on a cable I haven't heard. Dynaudio is another example. They tend to have a more laid-back sound than the more in your face aggressive performance of other speaker manufacturers(I'm looking your way B&W), but I'm not going to comment on a particular pair of their speakers that I haven't heard.
So I think the salient point here is that I don't have a problem with people giving opinions about the particular sound a manufacturer has, but I do have problem about people commenting on equipment that they have never heard. It's a fine distinction, but an important one.
So I think the salient point here is that I don't have a problem with people giving opinions about the particular sound a manufacturer has, but I do have problem about people commenting on equipment that they have never heard. It's a fine distinction, but an important one.