Balanced cables between Pre/Pro and Amps - Mogami 3080 cable and Amphenol XLR's built by "World's Best Cable."
HDMI by Blue Jeans Cable
35' BJC Series One - Projector
6' BJC Series One - OPPO UDP-203
all other HDMI are 3' or 6' BJC Tartan 24 Series cables
I BUILT all of the RCA-type interconnects (well, most of them anyway) using Belden 1694A cable and solder-type REAN RCA connectors.
LCR - Belden 5T00UP 10 Gauge x 2 bi-wire/bi-amp with locking banana plug connectors and spade connectors at each pair on both ends. I built an "Audiophile" speaker cable that can be seen in the room pics.
They do look VERY nice and "audiophile-ly"! As good as they look, it made zero difference in the sound over the simply separate 10 ga wire pairs.
I also DIY'ed Cable elevators. Not for any expected improvement in the sound, but to display my speaker cables :-)
Speakers in-walls and in-ceiling use Belden 14 Gauge contractor-grade speaker cable
"Audiophile" Power cables;
DIY 12 gauge Belden 83803 used on main power amps
DIY 14 gauge Belden 19634 used on pre/pro, ATMOS power amp, Yung Power amps, F18 subs, Triton One. R's and the JVC DLA-RS600U Projector
DIY "Audiophile" power cord using DH Labs Encore - 14ga 3-conductor – shielded - Audiophile Power Cable DHLABS-75520 Hi-Fi King and Red Copper AC Plugs and IEC Connectors and dressed up with Tech-Flex were used on Apple TV and JVC Projector
WAudio 10 gauge Audiophile cable used on OPPO Blu-Ray player
As I said, this room has afforded us much entertainment and enjoyment :-). Of course, I'll be forever tweaking and experimenting, but that is just because that adds to the fun for me!