TacanacyI would like to offer a small clarification. The connector on the BL03 is not QDC but rather an NX7. The cable you linked is appropriate but is not technically a QDC connector. Just don't want folks to get the impression a QDC cable will fit because it will not.
TacanacyWell, I know that the sleeve around the pins is squared off instead of rounded which should allow it to cover the neck of the bl03. The pins may be a bit longer which should not be an issue but I'll have to wait for my NX7 cables to arrive to confirm. 2 things are certain though. QDC will not fit because of the oval shaped sleeve and a TFZ cable which has a shorter sleeve will fit the BL03 but doesn't completely cover the neck of the BL03.
Nov 16, 2019
Tacanacy
Nov 16, 2019
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CyberthingyThe pins aren't just a bit longer, they are much longer.
TacanacyI finally received the cables I ordered on 11/11 and I can say that the NX7 style (also referred to as TFZ) does indeed work although it is not perfect.
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https://www.aliexpress.com/item/4000131324742.html?spm=a2g0s.9042311.0.0.29234c4dGg48Mt
The surrounding collar of the cable pins does not fully reach the base of the neck on the earphone. I suspected that was going to be the case because the TFZ cable I had from my King Pro fit the same way. It's not a perfect solution but a much better option than the straight variants of the .78 2-pin styles routinely used. I think the neck on the BL03 is unusually long compared to other brands.