This post is not a reflection of the skill of the OP, but I have listened to my Rhodes through both solid-state and tube preamps, and after considerable experimentation, I have concluded that a tube preamp adds essentially nothing to the Rhodes sound. Any observed difference in tube preamp sound, assuming that you're not over driving the tube and creating distortion, is caused by small differences in the frequency response of the particular tube preamp and the particular solid-state preamp being compared. Once the frequency responses are made equal, differences in sound disappear. Of course, one could design a poor quality solid-state preamp or a poor quality tube preamp, but am I referring to well-designed examples of both.