Can you clarify something? B&W models are often confused because of the stupid way in which the company named them. I believe the 803D (which has a diamond tweeter) came on the market around 2005 whereas the 803 Diamond (the current model which also has a diamond tweeter) came on the market around 2010. Unfortunately, it is common for people to refer to both models as 803D. Which model do you have, the first generation diamond tweeter model which is the 803D or the second generation diamond tweeter model which is the 803 Diamond?
