The supplied headphones was broken (partial).
Even at lower volume of right Höhrer rattled at extreme deeper bass / bass progressions, as if the membrane against strikes somewhere.
Probably a production error, very angry but at the price and the name of the manufacturer.
Let's see how this is a replacement unit. Then become assessing adjust accordingly.
*** Update ***
Exchange headphone is here! Exchanges took ca 1Week and was treated via the dealer (not through Amazon because Amazon does not offer Exchange option only return etc ...)
It has been delivered in the old packaging, but I did, based on the packaging, does not matter, a new headset.
The new listeners know on any deficiencies.
Can I bezügl. of the sound just connect the 5-star reviews.
Accordingly, I have the vote now also adjusted.
*** Update *** 2
And now back to the replacement device the same problem as with the first ...
And as I'm reading I'm in another review is not the only one with this problem.
Therefore adjust the valuation unfortunately again must.