there are indeed quite some reviews in Chinese, as their main market is in China. From what I have heard in those reviews they do come with an impressive sound. to conclude some of the reviews that ive read, these headphones has a overall neutral sound presentation, with a little shift to the mid and high end.
EtherealSoundthe bass impact from the BG is stronger than the DM6. The midrange of the BG is more forward with intimate vocals. Treble presentation is smoother on the BG. Soundstage width is quite similar. Depth on the BG is more closed in.
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