The problem right now as far as the 4A is concerned is I don't know what I should use as a gauge to determine if I have a proper seal. When I'm walking with them in I'm hearing cars etc all around me while others on the thread have commented that they hear absolutely nothing when out and about. When
Home i seem to be getting an almost perfect fit. Last night I was even able to lie in bed with them for a couple of hours with no issues whatsoever. When I'm out and about though I find myself having to fidget with them once every 20 or 30 minutes though and give them a light tap in. I'm not sure if its placebo and me having this thing in my head that I absolutely have to fidget with them or if there really is a problem.