I disagree with Estmad's genralization. The results would be system/preference dependent. In my system, with the SCD-1 used in the "Custom" mode I noticed a slight improvement in the "openness" of the sound stage, coupled with slightly better extension in the treble without any loss in bass extension. In fact, the bass seemed slightly more focused and defined in the Custom mode. In summary, there is an overall improvement in the sound of the system, albeit, more subtle than "earth shattering."
