Measurements on the DAC servers updated Analog Section.
The Analog section for the DAC server has two Analog outputs. One tube output with very natual sound and a Solid state output that is made with very low output impedance for use of a wide selection of head phones. This analog section has been developed with low distortion and a high signal to noice suppresion. when developing the analog stage it was very important for us to make sure the analog stages distortion are low with both max volume and low volume. This is to make sure the DAC Servers analog stage can support the DAC chip (ES9038) very high dynamic range. A dynamic range of more than 130dB.
The solid state Analog stage is shown in the YELLOW circle.
Lets take a look on the Measurements
Max signal level and Volume set to 0dB Attenuation, shows output level at 5.5Vrms and with a THD+n of 0.0082%
Max signal level and Volume set to -10dB Attenuation, shows output level at ~1.7Vrms and with a THD+n of 0.0015%
Max signal level and Volume set to -20dB Attenuation, shows output level at ~1.7Vrms and with a THD+n of 0.0015%
Max signal level and Volume set to -30dB Attenuation, shows output level at 173mVrms and with a THD+N of 0.005%
FFT spectrum of distortion+N.
The measurements shows an solid stage Analog output with low distortion and are able to show raise of the distortion when the volume is lowered to -30dB. Please also notice the very low noise level.