Here’s my system.
Computer with Signalyst HQ Player
Denafrips Terminator Plus DAC (No HP access) Got this a few months ago. Before this had T+A DAC8 DSD. (No harshness)
Audio Research SP 20 Preamp (has HP access sounds good but with a bit of sibilance)
Audio Research Ref 76 Power Amp
(Headphones run through speaker taps with a WyWires connector which sounds sublime). Can’t load a picture but the connector is basically a 4 prong XLR on one end with 4 female speaker tap inserts on the other end-2 left, 2 right).
The volume set for the Senn HP’s is around 3 and for the Hifiman HP’s is around 13.
The ARC power amp is newly acquired. I thought there would be better synergy after I started hearing the harshness with my solid state power amp (Primare A32). But the SS had been sounding very fine. The other new acquirements have been power cords (2 Silnote and 2 Wywires) which I got a few months ago. Before that I was using some 10 gauge generic power cords bought from Amazon without problem.