I used the cable with Jubilee 58X on ZX300. Recently sold both and the cable is no longer used. It works with HD 5 and 6 series perfectly (sorry not the 8). The cable itself and 4.4mm balanced is auditable difference from the stock cable. I initially saved the cable and 58x with the hope to get hands on an iBasso DC04. But that was only in the dream. Now that 58x is gone, I need to sell this cable as well.

The Earwax cable sells for around $40 on Aliexpress and has a month or more waiting for shipping (COVID has made it longer like all other shipment). I'm in NY and could ship it con-US. Asking $30 with PP fee and shipping included.

Description from the seller.

Specification:
Length: 120cm
Connector A: 4.4mm
Conductor:4-core *22*0.06/outer diameter 2.4*2
Material:99.9999% 6N Single Crystal Copper Silver Plating


Feature:
1. The Twisted pair balances wire, and the left and right channels are respectively grounded to improve sound quality. The wire rod is a complete wire rod from beginning to end, and the middle branch line is not disconnected from the welding, further improving the Lossless Signal transmission of the wire rod.
2.Resistance is 8% to 13% lower than common copper
3.Each core added 200D Kevlar armored wire, tensile strength of 50 kg or more, the core material is TPEE, the external material is transparent frostedPVC, more than the average life of ordinary insulation wire.