DIY Dr. Kevin Gilmore designed KGST "mini Blue Hawaii" hybrid SS/Tube electrostatic headphone amplifier. 1950s NOS Tungsol triple mica square getter 6S4A tubes with Herbie's tube dampeners. Alps RK50 recently replaced original build Alpha potentiometer. Also, replaced stock +/-15VDC supply in KGST with GRLV. All signal wired with custom Neotech UPOCC silver/gold (proprietary alloy ratio and insulation) wire.
In process of building: KGSSHV Carbon
Retired from headphone use:
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
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.
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.
Pangea 4% silver clad copper USB 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.
Other Audio Equipment:
2013 Mac Mini as music only server upgraded with
1TG external HD
Apple Airport Express (modified: separated SMPS, uncase PCB, AQ Jitterbug in USB port)
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 with vintage TAD TD-2001 HF compression drivers.
DIY Evidence Audio speaker cables
iPad Air LTE 32G
iPhone 6 Plus 64G