dCS Rossini Master Clock

The dCS Rossini Master Clock is the component that completes the Rossini system — not an optional refinement, but the timing foundation upon which the entire system's performance ultimately rests. In digital audio, jitter is not an abstract engineering concern; it is an audible phenomenon, and eliminating it is the difference between a very good digital system and one that operates at a genuinely transcendent level. The Rossini Master Clock addresses jitter with the same uncompromising precision that defines every component dCS make, and its effect on the dCS Rossini Apex DAC or dCS Rossini Apex Player is immediate and unmistakeable.

A Pioneer in External Clocking

dCS were the first company to apply external master clocking to a home audio digital system — a development that emerged directly from their work in professional recording studios, where the disciplines of timing precision and signal integrity are non-negotiable. That heritage is embedded in the Rossini Master Clock: the same principles, the same rigour, and the same commitment to eliminating every source of timing instability that dCS developed for studio use are here applied to a home audio component of extraordinary refinement.

Dual Crystal Oscillators and Microcontroller-Enhanced Temperature Correction

The Rossini Master Clock deploys dual crystal oscillators — not a single reference, but two independent oscillators selected for their long-term stability and then individually calibrated across a wide temperature range to ensure consistent optimal performance. Conventional approaches to oscillator temperature correction — oven-controlled crystal oscillators, or even atomic clocks — are less sophisticated than dCS's own solution: a microcontroller system that monitors temperature continuously and applies smooth, precise frequency correction as conditions change. Crystal oscillators are pre-aged before selection, eliminating the drift that characterises new components and ensuring that the Rossini Master Clock's performance is stable from the moment it leaves the factory.

Three Separate Clock Outputs

The Rossini Master Clock provides three separate clock outputs, each independently configurable to output different frequencies — a design that ensures maximum flexibility across systems with a variety of digital audio sources. The auto-clocking mode built into the dCS Rossini Apex DAC and dCS Rossini Apex Player works in direct concert with these outputs, automatically selecting the correct clock frequency for the incoming source and minimising jitter without requiring any manual intervention — simplicity of operation that conceals extraordinary sophistication of execution.

Word Clock Over 75-Ohm Coaxial

The Rossini Master Clock generates industry-standard Word Clock over a 75-ohm coaxial cable — the same standard used in professional recording environments worldwide. This means that other manufacturers' equipment designed to accept standard Word Clock can be incorporated into a Rossini system and clocked from the same reference, extending the benefits of the Rossini Master Clock beyond dCS components alone.

Multi-Stage Regulation

Sensitive clock and Phase-Locked Loop circuitry is susceptible to interference from the digital electronics that surround it — a fact that lesser designs address inadequately. The Rossini Master Clock deploys multi-stage power regulation to ensure that its clock and PLL circuitry operates in an environment entirely unaffected by digital noise, eliminating one of the most consequential sources of performance limitation in any clocking solution.

Aerospace-Grade Aluminium Chassis

The Rossini Master Clock is housed in an aerospace-grade machined aluminium chassis fitted with tuned acoustic damping panels — a structure that reduces both magnetic effects and mechanical vibration, two further sources of timing instability that dCS treat with the same seriousness as electronic noise. The chassis is not merely a cosmetic statement; it is a precision engineering decision that contributes directly to the measured and audible performance of the component.

Who Is It For?

The Rossini Master Clock is the natural and logical companion to the dCS Rossini Apex DAC and dCS Rossini Apex Player — for those who have invested in the Rossini system and wish to hear it perform at its absolute best. It is also a serious proposition for any system that includes equipment capable of accepting an external Word Clock signal. Those exploring the dCS range more broadly will find the same clocking philosophy applied at reference level in the dCS Vivaldi Master Clock, and at a more compact scale in the dCS Lina system — both available to hear at our Norwich showroom.

Buying from Martins Hi-Fi

Martins Hi-Fi has been in Norwich since 1968. Elizabeth Gould runs the business today, and we stock only brands we have heard properly and stand behind. The Rossini Master Clock is a component whose contribution to a Rossini system is most clearly understood through listening — and that is precisely what we invite you to do. Dave or Chris will demonstrate the Rossini system with and without the Master Clock at our Norwich showroom, so you can hear for yourself exactly what it delivers.

Contact us at [email protected], call 01603 627010, or WhatsApp on 07554 687137. You can read more about how we work on our Why Martins Hi-Fi page. We are at 85–91 Ber Street, Norwich, NR1 3EY.