I’ve bought fake ones with totally legit tags. So that method is not reliable in my experience.
The most reliable way to tell if they’re real or fake is to pop it open and look at the driver. Another way is to check for the tuning foam under the nozzle filter (none of the fakes I’ve seen bother with the foam).
But even if a pair had the tuning foam in the nozzles, I would still check the drivers. Because once the counterfeiters figure out the nozzle foam trick, they will start adding that because it will only add 1/10 of a penny to the manufacturing cost to add the foam.
The counterfeiters already figured out how to make the tags appear genuine, so it’s only a matter of time before they start adding the foam in the nozzle.
Remember, they all read the exact same “how to spot fake” guides as everyone else, and are always correcting the flaws and improving their fakes with each generation. That’s what they do, and they’ve gotten very good at it.
I remember when the Sennheiser Momentum fakes came out. The early ones were crap, and could be easily spotted. But then the counterfeits got so good, they actually were adding individual serial number stickers to the headphones under the earpads! And the cables and many other features of the fake headphone were manufactured so well, that the fakes started actually exceeding the build quality of the genuine Momentums! It was crazy, and the only way to spot the fakes at the point they got that good was to A/B the sound with a genuine pair (which 99% of people didn’t have access to).
Anyways, the bottom line on the MH755 is you have to open them up and examine the driver.
