Singaravelan
1000+ Head-Fier
Or the grand Hibyfc6, 20 dollars cheaper at https://store.hiby.com/products/hiby-fc6I'm not a believer of how wire material interact with the sound, but shouldn't copper cable reduces treble whilst anything with silver would increase the treble?
Maybe you need to take this opportunity to invest in an R2R or multi-bit dongle like RU7
That will solve the issue.
One comparison with ru6 & 7 at
Post in thread 'HiBy FC6--R2R dongle DAC reborn' https://www.head-fi.org/threads/hiby-fc6-r2r-dongle-dac-reborn.969134/post-17882816