The HE1KSE headphone side connectors are TRS and will remain that way no matter what.I am looking into buying a balanced XLR cable. Does it matter on the dual 3.5mm side if its TS / TRS / TRRS ?
What matters is you're headphone output on the device you're using calls for.
Does it call for a 4-pin XLR, dual 3-pin XLR or TRRS which are all balanced terminations?