Originally Posted by boarder1995
The huge improvement was in the tweeter between the Nautilus to the newer diamond "D" line. The bass drivers also went from paper (?) to Rohacell in the newer units. This is a thicker driver material that is supposed to isolate intenal box sounds from propogating to the outside through the cone. There was also some crossover tweaking as a result and that changed their characteristics a bit too. Overall, the newer "D" is a fair bit cleaner up top, easier to listen to for me, but the Nautilus line still draws a crowd and seems to sell well on the used market.
I would imagine that the main differences are in the top end, but, what about the mid-range and low end? Is the overall sound very similar between them? The reason I asked is because I have auditioned both the htm1d and the htm2d2. I absolutely loved them both, unfortunately, if I decide to go with B&W for my ht, I can not afford the diamond series. I would probably go with the Nautilus 803's or 804's, along with a Nautilus htm1. I am just curious to know how those would compare, sonically, to the Diamonds. The main thing I remember about the htm2d2 was how full and rich it sounded. I fell in love with that center channel! If anyone reading this has any of the Nautilus series that they might consider selling, then please PM me. Same for anyone with a diamond series center!