Oyeve, I own a pair of the Medusas and they are not isolating at all but I fail to see how that detracts from their ability to (almost) accurately represent 5.1 sound without waking up the neighborhood. I simply cannot use my 5.1 surround system w/ Halo 2 the same way that I can a pair of Medusas at 2AM or even 6PM. The neighbors don't appreciate being able to hear constant tatter of the BR and the appropriately loud grenades.