DIY Dr. Kevin Gilmore designed KGHV Grounded Grid electrostatic headphone amplifier. GRHV/GRLV PS. TDK 4CP-2500 volume control. With matched quad NOS, same 1960 datecode, DD getter, brown base, made in Brussels EL34 tubes.
Retired from headphone use:
DIY Dr. Gilmore designed KGST
DIY Dr. Richard Marsh designed headphone amp. A great amp, only reason I retired it, can only play with dynamic headphones, which I no longer own.
DIY PP 6V6 tube amp (based on Poindexter's Musical Machine with Electraprint PSSS Copper Primary/Silver Secondary output transformers)
Music Angel PP 6P1P (6AQ5) tube amp
Schiit Yggdrasil with Gen 5 USB and Analog 2 upgrades.
Retired and or sold:
Schiit Gungnir w/USB gen2
DIY ESS9023 DAC with LiFePo battery supply
DIY Buffalo II DAC with Paul Hynes shunt regulators and supply, then replaced with LiFePo batteries.
DIY balanced cables made with custom Neotech UPOCC silver/gold (proprietary alloy ratio and insulation) wire, Furutech rhodium plated XLR connectors, and using WBT 0805 lead free silver solder.
Matching Furutech rhodium XLR panel connector on amp.
Pangea Audio Premier XL USB Cable A> B cable (0.5m)
2x 18Ga (effectively 15Ga) solid silver w/teflon insulation umbilical cable between DIY LPS and Mac mini
Lifatec glass toslink
AudioQuest Vodka Ethernet
Ridge Street Audio Designs Poeima!!! silver-ribbon balanced XLR interconnects
Curious USB Cable
Straightwire Crescendo II balanced XLR interconnects
Monoprice XLR balanced interconnects
AudioQuest Diamond USB cable
Q Cable French Silk TRS single ended copper litz headphone cable.
DIY Evidence Audio XLR balanced interconnects
Schiit PYST XLR balanced interconnects
Silflex glass toslink cable.
Stock Audeze ADZ6SE TRS single ended and ADZ6B4 XLR headphone cables
Moon Audio Silver Dragon V3 Premium headphone cable
OE power cords.
DIY Paul Hynes PR3HD with choke input 12VDC Linear Power Supply for Mac mini.
Other Audio Equipment:
2013 Mac Mini as music only server upgraded with
1TG external HD
Apple Airport Express -modified (retired)
AQ Jitterbug (retired)
W4S Remedy (retired)
Sonore microRendu (retired)
Uptone Audio UltraCap LPS-1(retired)
Altec 890C Bolero speakers modded with vintage ESS Great Heil AMT tweeters.
Altec Model 19 speakers.
DIY Evidence Audio speaker cables
iPhone X 64G
Shorted all unused Yggy inputs.
Synergistic Research Blue fuse (5x20 800mA fast blow) for Yggy