My experience with the hissy/spitty low-level leakage noise is that it more or less went away all on its own after 3 weeks or so of near-continuous use. It only acted up a grand total if ONCE thereafter; I have the system powered up now continuously & summer humidity is here (a mere 75%RH at this moment) and...not a single "fart" in a month now. What I suspect happened here is that this is an initial break-in gremlin. And that instead of contacting Koss (who may well have just sent you a new one for $25 to cover shipping, as is their policy) you (not unjustifiably) kind of panicked & did one of the few things that you felt you had the power to do. So you jumped to a hypothesis/conclusion about the wall-wart, replaced it with this shiny chinese regulated Breeze thingy, and the problem simultaneously disappears (which is my point!), so you assume, as perhaps did some others in a headhifi forum, that the Breeze "solved" the problem. I think TIME solved the problem, & your purchasing this questionable-quality Breeze POS just happened to coincide with the break-in timeline for the problem to sort itself out all by itself, leading you to a false conclusion both as to the actual nature of the issue & it's solution. Why don't you reconnect the stock wall-wart & see if the problem returns? I'll bet it doesn't! You can also see at least one other poster in this forum tried my "tapping" advice & found it equally definitive! Also with no further comments about the problem returning, much less getting worse! Electrostatic drivers are "tweaky" things, kind of like valves (vacuum tubes). They don't necessarily work as predictably "right out of box" as inferior technologies do, so they are things that aren't for the "faint of heart". The other side of the coin is that their behaviour, whilst a bit "different", shouldn't be so flakey & unreliable as to leave owners' in a continuous state of bewilderment and/or anxiety as to what will happen every new day they turn things on to have a listen! Then, clearly, the product is "unfinished", a prototype perhaps, and the prospective owner should at least be warned that they are "Beta Testers"!! I heard my first ESP/950's back in 1994, so they are NOT prototypes! As well Koss has a LOOONG history of making Electrostatic headphones; these aren't my first Koss Electrostatic phones, I also own a perfectly functional (if ergonomically highly flawed, they weigh a TON!) 1970-vintage pair of closed-back ESP6's! Only Stax, AND KOSS, have a proven track-record for making reliable & durable Electrostatic headphones. NO ONE ELSE! Other companies tried their hand at it & failed, like Numark & PWB, whose phones I either once owned or still do in broken & unrepairable condition. For that reason, I also advise caution to rich fools who might dive into the latest multi-kilobuck offerings from either HiFiMan or Mr. Speakers (never mind Shure in-ears). If the power supply WAS the source of the whining hiss, then it would be there CONSTANTLY, not just very occasionally. It would also be COMPLETELY unresponsive to any poking or prodding of the earcups, or jiggling of the headphone cable itself. You walked yourself into the unnecessary purchase of a cheap & flashy regulated power supply that you almost certainly don't need, at the same time risking your "golden" lifetime warranty! You should at least contact Koss to discuss your problem(s), and get their blessings about using the Breeze or any other "flavour of the minute" power supply.