The box is sealed. You will open - you will not return. Here, for the JBL T100 bought before, this turned out to be just the only advantage :) they opened the box, listened, and went to return it. I will add in fact a more detailed listening. Who says that the problem with the bass - try to choose the size of the pads more carefully so that the headphones are deeper into the ear and at the same time sit firmly. The difference may pleasantly surprise you :)
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