Seems I remember someone telling me there are ways to tweak your stereo settings on the stock CL/TL sound system, to improve sound. I was just in our TL-S, wishing for more bass (not ground-pounding, I was listening to John Hiatt in his electric mode) and a little "concert hall" effect. Are there ways to specially tune the system to your individual taste without adding aftermarket components? Thanks. John P.