@bigkidz
The CD 306 SACD (professional version) and the regular CD 306 SACD (non professional version) both have same DACs and DAC configurations and implementation and same analog output stages. However, the HDCD filter or decoding chips are different for these two models and the DSD filter or decoding upsamplings for SACD playbacks have been upgraded in the professional version. But the main difference between these two models (professional & non professional versions) are the power supplies and power supply capacitors banks (capacitance). The professional version (latter version) has upgraded power supplies and numbers of capacitors and capacitance banks compared to the non professional version.