10-29-13: Mapman
When I mention bandwidth, what I am really looking for is better low end extension. Sp 16 has very clean and articulate bass but not as extended as even my old Carver pre-amp, though the sp16 whoops it in most every other way.
I have owned 3 ARC preamps, though not the SP16, but I can say that your description of the bass sounds very similar to my experiences with all three of my ARC preamps. They are high definition for sure, lots of detail, but they do lack a bit of musical weight.