Received defective item. Right ear is not working. Seller pulls the time till the end of protection period and currently i'm not able to get my money back =( Be aware - do not waste your time and money for this fake product
Disassemble the right ear part to find the problem. This IEMs made from poor quality drivers 2pcs of 30037 drivers and 1 pcs 31587. So it's not 6BA it's 3BA(or 4BA as so 31587 is "dual"). In my case one 30037 in cliff =((( In any case 30037 is very low cost driver and seller is a liar! Be aware
Pretty good quality, sound.