Eatern Electric
http://www.eeaudio.com/
MiniMax DAC Plus

Highlights of the MiniMax Vacuum Tube DAC Plus
Sabre ES9018 DAC chips
Separate Power Transformers for digital and analog sections
Inputs : AES/EBU, BNC, RCA, OPTICAL and USB
M2Tech OEM 24bit 192KHz Async USB input
Tube and solid state output selectable
Phase In/Out selectable
Sampling rates : 16-32bit 32KHz - 192KHz