The 8-core re-cable "NADIR" superbly uses high quality, domestic copper wire.
It suppresses the harsh high-frequency piercing while cleanly enriching the low frequency.
The most suitable cable if you favor the sound quality of the overall system, such as with earphones and players, but are concerned about high-frequency piercing.
An 8-core cable is often moderately thick and can be stiff, but the knitted cable adds softness to maintain flexibility.
Plugs and connectors can be freely selected according to your equipment.