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The drivers could be stiffer as I noticed a definite movement from them if the E7’s were jostled too much, so these are not for running, biking or anything like that
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I thought it might be the poor Bluetooth driver for Windows 10, but the sound is exactly the same on my iPhone
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I also haven't detected any sibilance in the high end, which cheap drivers can often give you
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, the driver in the right casing came loose and just rattles around
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Noticeably the sound quality is better as well as I personally like the finish on these as compared to their previous gloss counterparts