1 (Short): Could the Sennheiser *Headphone Redacted*'s veil be a result of the ~70hz bump rather than the treble "roll-off"? We could make this hypothesis testable by restating it as: "Does emphasizing/deemphasizing certain frequencies alter the perception of others?" 2: Could the acoustic properties of open-back headphones be the result of the lack of backwave reflections and how our brain uses them to judge the acoustic "size" of the room? Our brain possibly seeing the "room" as of a "default" or "infinite" size? (This may be an overextension of the original hypothesis, and may need one of its own to be properly tested.) I know these questions are more about psychoacoustics than most of Sound Science probably has background in, but I thought these questions would interest people regardless.