I'm new to the forum. I have a question about the sound cards that are installed in back of the keyboards. I have a KN6000 and have heard in the past that one of the sound cards has a better (fuller) piano sound than the excellent main piano in the KN6. I would appreciate knowing which card has this better piano sound. It seems to me that it was called the EW-65 but when I inquired about it from Technote, I was told there are 4 cards and they are Number 1 - Pop, Number 2 - Vintage, Number 3, etc., etc. According to what I was told, there is no reference to EW-01 and in this case, what I thought the updated piano was in, the EW-65. Am I confused or what? Anyway, I would appreciate hearing from you members which card I am referring to and just how good this piano sound is and above all, if better, why and how does it sound better? The one in the KN6 is very good.