I bought the BT20pro of the main body with a QCD cable, but I bought an additional 0.78-2pin cable for NX7pro & Mark3 of nicheck. Both the BT receiver and the NX7 have good resolution, so if you pair them, they will become resolution monsters and will be the best listening experience. Some people may find the treble a little tight? I compared it with several KZ earphones, but it seems that I like the combination of BT20pro and NX7Mark3.
Thanks