I am putting this here as I mostly use Hart Audio Cables with my Shure SE-426, SE-536, and Etymótic ER4SRs via BT with my iPad. I also use them on my iPhone and Apple Watch U2, using a FiiO BTR17 BT DAC/Amp. I very much like what I am getting from this outfit. Made in the USA. There is nothing voodoo audio about Hart's Custom cables; they are reasonably priced and well made. You can specify the plug, the cable type, and the cable's color. You can also get it fixed up with their adapter set so you can plug your headphones and IEM'a into anything. The FiiO BTR17 uses a 4.4mm balanced audio output and an unbalanced 3.5mm. It is nice to have a cable I do not have to use an adapter. The sound you get from a truly balanced audio output is astonishingly better than an unbalanced (common ground) output.
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