Otomon Lab DAC tube preamp CD DAC, USB, Bluetooth

This used R2R DAC which is considered the best quality of DAC board.
Output uses tubes, not OPamp

Power supply was separated with main block and DAC board to prevent hum and noise from AC voltage.

This is prototype version, does not include Bluetooth but ordered made version will be added based on requirement of customer.

All tubes are included.

Sound is very wide range, quiet and detail. No color is added to sound, true sound, live and dynamic.

Tube using in amplifier
Recitifier tube : EZ-81x1
Preamplifier stage: 12AY7(12AT7) x 2
All tubes are included

Specification:
Line, AUX:
Response frequency 10Hz ~ 80KHz
Hum level: Under 0.1mV