dCS Rossini Master Clock


The dCS Rossini Master Clock stands at the pinnacle of precision timekeeping, setting a new standard for digital audio playback. Forming an integral part of the Rossini range, this Grade 1 master clock embodies dCS’s pioneering advancements in both studio and home audio, ensuring excellent sound reproduction from a diverse array of digital sources. With three distinct clock outputs capable of delivering different frequencies, the Rossini Master Clock empowers users of the Rossini DAC or Player to harness the auto-clocking mode, effortlessly optimizing audio quality across various digital platforms.

In digital audio systems, the accurate transfer of samples is paramount. Jitter, or instability in sample timing, is an inherent factor in all digital setups. Severe jitter can lead to timing discrepancies in data delivery to the DAC, resulting in inaccurate analog signal reconstruction. While the DAC can serve as the system master clock in a dCS setup, extensive listening tests have unequivocally demonstrated the unparalleled benefits of a dedicated, high-quality master clock.

dCS has been at the forefront of external clock implementation in digital audio systems, continuously refining clocking technology. The latest iteration, a multi-stage Phase-Locked-Loop (PLL) system, establishes a new benchmark for precision and control over jitter from incoming audio streams, solidifying its position as an industry leader.

Key Features:

  • Flexibility Redefined: Engineered for maximum flexibility, allowing optimized output configurations in systems featuring diverse digital audio sources.
  • Advanced Crystal Oscillators: Equipped with dual crystal oscillators enhanced by microcontroller-driven temperature correction, ensuring exceptional stability and accuracy.
  • Innovative Frequency Output and Auto-Clocking: Incorporates a dual-frequency output and auto-clocking mode utilized in the Vivaldi and Rossini range, streamlining operation and minimizing jitter, particularly with computer audio sources.
  • Impeccable Regulation: Multi-stage regulation safeguards sensitive clock and PLL circuitry against digital interference, ensuring a pristine signal path.
  • Precision Engineering: Housed in an aerospace-grade machined aluminum chassis, complete with meticulously tuned acoustic damping panels, it mitigates magnetic effects and vibration.


  • Type: Class 1 Master Clock.
  • Clock Frequencies: 44.1kHz or 48kHz.
  • Color: Silver or Black.
  • Dimensions (WxDxH): 444mm/17.5” x 435mm/17.2” x 64mm/2.6”. Allow extra depth for cable connectors.
  • Weight: 8.3kg/18.3lbs.
  • Clock Accuracy: Better than +/-1ppm when shipped, typically +/-0.1ppm when shipped and stabilized.
  • Word Clock I/O: 3 independently buffered outputs on 75Ω BNC connectors.
  • Start-Up Time: Typically 1 minute to rate accuracy.
  • Local Control: RS232 (limited to Power and Clock 3 output frequency).
  • Power Supply: Factory set to 100, 115/120, 220, or 230/240V AC, 49-62Hz.
  • Power Consumption: 3 Watts typical / 4 Watts maximum.

The dCS Rossini Master Clock redefines precision timekeeping, offering an unparalleled foundation for digital audio playback, setting the stage for an auditory experience of remarkable depth and clarity.


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