Audio...all kinds and music (writing/playing/recording/listening)
Headphones
HD650's/AKG 240M 600Ohm
Headphone Amps
Audio-gd C-2C/Compass/Phoenix (coming in June) and yet to be determined balanced tube amp
Sources
Audio-gd Ref 1 DAC, Audio-gd CD7 Transport, Vanguard CDM12 Pro Transport, See Corp Vintage TT/Mission/Ortofon OM20 MM/Tube Phono amp/ TEAC V530X Cassette deck, Various DIY DAC's
Other Audio Gear
Huge variety of SS amps and some tube gear. Planar magnetics...Magnepan and Eminent Technology LFT VIIIb, Titanic II subs x 3, various active xovers (Paradigm, Marchand, Digital DSP room correction)