Short version: Any IEM recommendations that work with the original Vali, possibly including active noise cancellation models, or is it time for an electronics upgrade?
Longer version: A good part of my working day is on-site consulting with one customer. They have recently moved to a new facility, and part of their uplift (?) prior to moving in was drinking the Noise == Privacy Kool-Aid ... They installed noise emitters in the ceiling, adding more to an already noisy HVAC system. If I measure (off-hours, empty) background is 49-50 dBa in my cube, with line of sight to a half-dozen of the bloody emitters.
In the former location (no noise emitters) I listened to my Vali with DT-250, or the less comfortable but better-isolating DT-150 headphones. I wear glasses so the headphone pad seal isn't perfect, but I had enough isolation to cope with the old building's HVAC noise. Not enough for the new location's HVAC plus masking (plus people) noise. Also, I'm suddenly experiencing a lot of neck and shoulder pain. There could be a lot of reasons for that, I'm trying to "shotgun" all the possible answers before I end up unable to work, so reducing weight worn on my head all day long seems desirable.
IEMs for better isolation and less weight seems like a possible answer, but most that I've looked at have very low impedance, making me think I'd have a much more audible noise floor. Anyone have any recommendations for a pair (higher impedance and/or lower efficiency?) that work well with the Vali? Has anyone tried the Bose Quiet Comfort 20 with the amp? Having only Bose-supplied ear tips seems a limitation, and reviews for them seem all over the map.
Or am I going to have to retire the Vali for something else in order to pursue more isolation and less weight?
Edited by AMRoberts - 11/15/16 at 3:57pm