Headphone Reviews

Pass Labs HPA-1 headphone amplifier Associated Equipment

Sidebar 2: Associated Equipment

Digital Sources: Antipodes DX Reference, Aurender N10 music servers; Apple 2.7GHz i7 Mac mini computer running OS10.9.4, iTunes 12, Pure Music 3.0, Audirvana Plus 1.5.10; PS Audio PerfectWave DirectStream, Logitech Transporter D/A processors.
Headphone Amplifier: Ayre Acoustics Codex.
Headphones: Audeze LCD-X & LCD-4, AudioQuest NightHawk, Master & Dynamic MH40.
Cables: USB: AudioQuest Coffee. Interconnect (unbalanced): AudioQuest Fire. Headphone: Cardas Clear (balanced), manufacturers' own (unbalanced). AC: manufacturers' own.—John Atkinson