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Auralic LEO GX Reference Master Clock


Brand Auralic

As digital music formats and system components march ever forward in quality and capabilities, high-end audio systems increasingly rely on the precision of their clocks to keep the digital realm in order. The greater dynamic range of high resolution files for example is only realized with the help of modern clocks that are capable of working frequencies nearly ten times higher than what was common just a handful of years ago. However, today’s high-frequency DAC clocks are costlier and much harder to design and build than ever before.

LEO GX is a breakthrough in digital audio system clocking — the first master clock ever that can feed a DAC directly with a working signal so precise we had to use new benchmarks to measure its performance. Wider staging, pinpoint locational accuracy, and an expanded dynamic range are just some of the benefits you’ll hear when you implement LEO GX’s one-of-a-kind approach to clocking that literally bypasses the traditional limitations of internal DAC clocks.


Allan Deviation: 2E-12 (1 second)
Equivalent Jitter: 500 times less than an 82fs femto clock (1Hz-10Hz)
Equivalent Phase Noise: -110dBc/Hz@1Hz (Ref Frequency: 10MHz)
Frequency: 90.3168MHz (44.1KHz) | 98.3040MHz (48KHz)
Output Level: 3.3V CMOS (Direct-to-DAC Design)
Reference: Temperature-controlled Rubidium atomic clock
Oscillator: Temperature-controlled SC cut crystal
PCM: 44.1KHz to 384KHz in 32Bit

DSD: DSD64 to DSD512 in 44x and 48x

Switch sampling rate automatically via Lightning-Link with G2 DAC

Dual Purer-Power internal linear power supply
10uV low noise designed for audio circuits

Optical isolation between control and clock circuits
EMI-shielding Unity Chassis

Gigabit Ethernet (For firmware upgrade use)

Warmup: 30W at max
Running: 15W

13.4 x 12.6 x 3.2 in. (34cm x 32cm x 8cm)

17.8 lbs (8.1kg)

Anodized precision-machined aluminum case in matte black


AURALiC LEO GX Reference Master Clock
Hex wrench (for use of tighten clock cable)
Users's guide
Power cord
Lightning-Link cable

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