The Pulse 2.0 chassis was designed to fit several products in the line, including the tube headphone amp. The height of the tubes defined the height of the chassis. The depth was originally made to fit the Pulse DAC board. I don't know what criteria they used to select the unnecessarily wide footprint for most of the Pulse products. They were going to use the same basic chassis for all Pulse products. This would have forced them to redesign the LPS, as its board is somewhat longer than the DAC, however they appear to have mde a separate chassis for the LPS that is longer to fit the LPS boards. I dind it unfortunate that they chose the wide and not deep footprint that they did. Also unnecessary is the same height for all components, just because one (the tube headphone amp) required a tall enclosure. There is a lot of wasted space in most of the units.
As for the current and apparently final design of the Source... Good lord, that thing is HUGE! I do like the large display, but the width mkst definitely takes it out of the desktop category.
J.P.