FiiO RC-MMCX1s สายอัพเกรดหูฟัง

So, the purpose of the RC-MMCX1s is to replace the stock MMCX cable of your chosen IEMs (assuming that they have a detachable MMCX cable), and in doing so shortens the cable length between the IEMs and whatever device it’s plugged into. Of course this means that the RC-MMCX1s is compatible with pretty much all of Fiio’s IEMs, as well as a wide variety of IEMs made by other manufacturers.