AKG K702 65th Anniversary Edition Open-back Dynamic Headphones with Varimotion Diaphragm and Leather Headband (Made in Austria)
NAD - VISO HP50 (Black)
NAD VISO HP20 In-Ear Headphones
FiiO D3 (D03K) Digital to Analog Audio Converter - 192kHz/24bit Optical and Coaxial DAC
Spatial Hearing - Revised Edition: The Psychophysics of Human Sound Localization
The Technology of Binaural Listening (Modern Acoustics and Signal Processing)
HIFIMAN HM700 32G Portable Player plus RE600 In-Ear Monitors/IEMs
HIFIMAN - HE-400 Headphones
HIFIMAN EF2A USB Headphone Amplifier
Fiio X3 Mastering Quality Music Player w/ Wolfson DAC WM8740 24Bit 192K
ABCShopUSA Headphones