Using an AMD based p.c. built myself using as many low noise hardware components as possible (when built), Cooler Master Silencio full size AT case, Cooler Master silencio psu with a Gigabyte 990FXA UD3 mobo, AMD FX8350 at 5GHz with 32GB RAM, ASUS RX570 04G graphics, a Creative ZXR with daughter board (Not using the extra headphone/microphone dongle thing) seperate to the 24/192kHz on board audio processing, these get fed into a Pioneer VSX cinema amp (ESS Sabre DAC with line level pre-outs that can feed the Mackie's direct through their alternative RCA inputs) with KEF KHT2005 satellites and sub (modified amplifier on board the sub).
The ZXR has the option to change op-amps easily if needed to tailor sound quality so have some BurrBrown 27's and NS opamps on hand, I forget the NS opamps model numbers, they are a five digit model and not the usual 5532/4s or TL071/72 types.
Also a Focusrite 6i6 via USB at 24/88.2 or 96kHz, feeding a pair of Mackie HR624's via balanced XLR out's. The Mackie's have had a few mod's in the power supply department, decoupling and main reservoirs done myself. The Pioneer mentioned above can also be fed from the Focusrite, or direct from whichever analogue or digital out chosen on the mobo, ZXR or network.
Foobar v1.6 with DSD/SACD playback option via ASIO or WASAPI. Usual up/downsampling options depending on which outputs are being used. Full native DSD/LPCM/WAV options to Pioneer via HDMI or network connection. Also FLAC, AIFF, m4a, MP3 etc via various ouputs.
Neutron music player, from Samsung S9 for portable duties, through UPnP to either main outputs, Focusrite or Pioneer if used at home. Best music app, imho, after trying them all, semi clunky interface easily gotten used to and it has some decent options regards sound tweaks - selectable oversampling, 32/64bit processing (dependent on source file etc), dithering, direct DSD out or DoP and upsampling to 768kHz via offboard USB DAC if you want that. Also the progeammable, up to 50 band, parametric (or standard) eq is pretty handy. 30 bands is enough for my needs though once all frequencies have been chosen and saved.
Home made headphone amplifier using paralleled BJT's in class A mode feeding AKG K701pro, Beyerdynamic DT880 or Sony 7506 pro's.
AKG K376, AKG K476 Pioneer SH 5's, Sony MDR EX650AP direct to Samsung S9 or through headphone amp.
Various interconnects by IXOS, QED, Van den Hul, Audioquest and Cable Talk (collected over time). These do standard analogue, 75ohm SPDIF, TOSLINK optical or HDMI duties.
QED silver speaker cables.
Home made fully shielded IEC power cables.
Home made and designed multi oultet (x8), multi ampere rated per outlet power supply filter, 32kVA total power available at 240Vac. Double isolated.