Puccini U-Clock also features a USB-to-S/PDIF converter, which lets owners play high resolution audio from a computer through the legendary dCS Ring DAC™ inside the Puccini.

SKU: DCS PUCCINI U CLOCK-silver Categories: , ,



  • Four Word Clock outputs further reduce jitter and improve sonic performance.
  • Asynchronous USB input allows direct connection of a computer audio source and supports high resolution files up to 192kS/s PCM, and DSD in DoP format.
  • Isochronous and asynchronous USB mode prevents the source injecting jitter into DAC.
  • High-grade aluminium chassis and laminated acoustic damping panels reduce magnetic effects and vibration.

Technical Specifications

Type System Clock.
Colour Silver or Black.
Dimensions (WxDxH) 400mm/15.8” x 410mm/16.2” x 58mm/2.3”. Allow extra depth for cable connectors.
Weight 7.6kg/16.7lbs.
Clock Accuracy Better than +/-1ppm when shipped over an ambient temperature range of 10°C to 30°C (guaranteed for 12 months from shipping). Typically +/-0.1ppm when shipped and stabilised.
Worldclock Inputs 4 independently buffered outputs on 75Ω BNC connectors, all carry the same clock frequency. With the USB interface active at 32, 48, 96 or 192kS/s, the Word Clock outputs are set to 48kHz. With the USB interface active at 44.1, 88.2 or 176.4kS/s, the Word Clock outputs are set to 44.1kHz. USB Auto Frequency mode can be disabled from the front panel.
Digital Inputs USB 2.0 interface on type B connector accepts uncompressed audio data at 32, 44.1, 48, 88.2, 96, 176.4 & 192kS/s plus DOP.
Digital Outputs Puccini U-Clock will present data received via the USB interface, unprocessed, in SPDIF format via 2 x RCA Phono connectors. DSD in DOP format will be passed through unchanged.
Operating Systems Tested on Windows XP/Vista/7 and Mac OSX. Operates in ‘Audio Class’ mode. Class 1 mode (limited to 96kS/s) is available and does not require special drivers to be installed. Class 2 mode requires the dCS drivers (supplied) to be installed on Windows PCs. Not required for OSX 10.6.3 or later.
File Formats Packetised PCM at 32, 44.1, 48, 88.2, 176.4 & 192kS/s.
Startup Time Typically 1 minute to rated accuracy.
Power Supply Factory set for 100, 115, 220 or 230V AC, 49-62Hz.
Power Consumption 3 Watts typical/6 Watts maximum.


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