I learned to play the keyboard on my father's DX11, in the late80s/early 90s, and remember the sounds with warmth. The DX11 doesn't seem to have been at all as well known or iconic though, and have only seen the DX7 being written extensively about.

It seems to have been quite closely related to the DX7 though, based on some info I found:https://www.vintagesynth.com/yamaha/dx11