OPPO Sonica DAC Audiocom Signature edition takes sound quality to new heights wringing every last ounce of performance out of the ES9038PRO chipset. This new chip is a significant improvement on the previous flagship 9018S in several areas. Enhancing the already excellent Sonica DAC, the ‘signature’ version includes an array of upgraded components: discreet, ultra-low noise regulators and 68 femtosecond reference clock for DAC as well as materials to achieve the quietest electrical environment inside the dac.
Power Supplies: The sound quality of any DAC is largely influenced by its power supply. Our goal is to reduce unwanted noise and losses that affect the signal, less noise = cleaner signal and purer sound. In the Sonica DAC Signature we have upgraded the digital and analogue power supplies to achieve maximum fidelity.
Discrete, Ultra-low Noise Regulators: The concept of low noise is continued on the DC power supply where conventional regulators for the analogue stage are replaced with discrete, ultra-low noise types which have 1/168 output noise and nearly 2000 times the Ripple noise rejection (PSRR). This enables a very low noise floor, while improving dynamic range and stereo separation.
Femto Clock: To realise the full potential of the ES9038PRO chipset we have to achieve lowest phase noise (jitter). The clock selected for the Sonica DAC Signature has an astounding 68 Femtoseconds jitter RMS (frequency measurement 100 Hz to 100 KHz) , that’s 0.068 Picoseconds, amongst the lowest in the industry. The clock utilises ultra-low noise discrete regulator circuitry, 1.1nV/√Hz @1KHz with a PSRR of 132 db @ 6V. The implementation of this femto clock fully optimises the ES9038PRO so its full potential can be realised.
RFI Reduction & Resonance Control: The operating conditions audio are much improved when they can work in quiet environment. Inside any DAC the digital processing generates its own noise as well as succumbing to external noise which can affect the players overall performance. To achieve the quietest electrical conditions, in the Sonica DAC Signature we use materials to shield and absorb the unwanted EMI/RFI to achieve constantly the best performance regardless of the surroundings.