Upsampling DAC 24bit / 96 kHz using tube buffer

Upsampler and a DAC. High quality Asahi Kasei (AKM) AK4393 DAC chip with upsampling 24 bit / 96 kHz function. Uses no  op-amp but tube buffer. This utilizes the symmetric output signal from DAC chip fully, giving very wide and spacious sound with lot of details.

Inputs: 2x RCA SPDIF (75 ohm 0,2 ... 5V p-p); 1x Toslink (optical)
Output: 1x RCA
Input signal acceptable formats: 31 ... 100 kHz, auto PLL syncronization
D/A conversion: 24 bit / 96 kHz
DAC chip: Asahi Kasei AKM AK4396 128x oversampling delta-sigma converter
S/N: >102dB
Jitter suppression: >40ns
Buffer tubes: 6Н16Б
NIXIE tube used for indication of selected input
Output signal: ...4V adjustable
IR remote control for volume adjustment and input selection.
Dimensions: 430 x 250 x 100 mm; 10 kg
November 2014