dynamic range -the good and bad?

so dynamic range in a given recording is limited by many factors,correct? And I have read many many threads that make dynamic range sound very ideal, correct? ok, that said, I thought I had a decent surround sys setup, marantz reciever and enegry take speakers. Assumed I had good dynamic range, and maybe I do. But I just set up my new 2 channel (extremly modest) system. Threw is some classical and now I notice something I havent before. The soft passages are queit so i turn it up and the louder passages are to loud!!! Is this normal? Guess it could be my room, the cd, or equipment but is this a common problem?