Auralic Leo GX.1 Ultra-Precise Clock Generator Black

Traditional Timing

Typically, phase-locked loop (PLL) circuits in a DAC are used to synchronize the internal working signal with the more precise input signal from a reference clock. But they are noisy. And while the working signal can be slightly modified to match the reference signal, its frequency—and the accuracy of the analog waveform based on it—is ultimately limited by the DAC's own clock circuitry.

DAC-Direct Design

Thanks to its unique jitter-free operation, when the VEGA G2.1 joins forces with the LEO GX.1, they achieve something extraordinary. Instead of simply synchronizing to the LEO GX.1, the VEGA G2.1 directly uses the LEO GX.1's ultra-high-frequency input clock as its working signal. In other words, the LEO GX.1 completely bypasses the VEGA G2.1's internal clock circuitry and drives waveform generation directly with its own signal. No more PLLs and no more limitations.

A new performance description

The LEO GX.1's clock is so precise that existing benchmarks aren't detailed enough to accurately represent its capabilities. To describe the resolution of the LEO GX.1, we use Allan deviation, which is equivalent to looking at the phase noise carefully enough to detect deviations of +/-1 Hz or even +/-0.1 Hz. The Allan deviation of the LEO GX.1 Reference Master Clock is 2E-12 (at 1 second), which is equivalent to a 10 MHz rubidium atomic clock with +/-1 Hz phase noise at -110 dBc/Hz, or an astonishing 500 times lower jitter than an 82 fs Femto clock oscillator.

Clock Structure

The LEO GX.1 hardware is based on two temperature-controlled rubidium atomic reference clocks. Each is paired with an oscillator using stress-compensated cut crystals to ensure thermal and mechanical resilience and low phase noise performance. The result is the LEO GX.1's extraordinarily high signal frequencies: 90.316 MHz for 44.1kHz audio signals and 98.304 MHz for 48kHz signals.

Optical Isolation

We've done everything possible to reduce interference and noise in the new LEO GX.1, including the use of optical isolation techniques that keep the systems physically separated from each other. Control signals from the processing circuitry are sent to the clock circuitry via fiber optic cables rather than electrical paths, so the source of the LEO GX.1's impeccable timing is never disturbed.

Unity II Chassis

The LEO GX.1's chassis is designed as a double casing, in which a high-quality aluminum outer casing is complemented by an inner copper layer. A high-mass base and an upgraded quad-foot multi-spring suspension system complement the LEO GX.1's Unity Chassis II's whisper-quiet performance.

Perfectly Balanced

The LEO GX.1's internal circuitry is physically distributed to improve balance and overall performance. Its specially designed feet dampen and absorb vibrations, so the operation of its internal clock always starts from a rock-steady base.

Dual Purer-Power Linear Power Supplies

We've equipped the LEO GX.1 with two of our ultra-quiet Purer-Power linear power supplies, galvanically isolating them from each other in our constant pursuit of reducing noise and creating a pristine working environment. One Purer-Power PSU powers the LEO GX.1's processing system, while the second powers the clock circuitry. Interference between the two areas is minimized, so nothing can get in the way of the LEO GX.1's stellar performance.

Realizing Full Potential

The LEO GX.1 is such a precise clock, running at an ultra-high frequency, that you'll need the best interconnect cable to unlock its full potential. We've created a cable specifically for the LEO GX.1, crafted with military-grade materials and connectors with a 60GHz bandwidth. Handcrafted and precisely calibrated, it comes with a performance data report to ensure its specifications are up to the task at hand.

An Integrated Family of Devices

Built around cutting-edge transfer protocols, more powerful processing, and improved engineering isolation, the G2 and G2.1 represent a new concept in component integration. Our flagship series delivers ultra-fast connectivity, powered entirely by Lightning Link. Everything from audio to digital clocking and control signals is easily handled by Lightning Link. Every G2 and G2.1 product features a Lightning Link connection port, allowing them to be stacked together.

Lightning-fast connection

The 18Gbps high-speed HDMI connection offers ultrafast two-way communication and boasts the only truly jitter-free connection in the world of high-performance audio. As an added benefit, the G2 and G2.1 products can be seamlessly linked, allowing them to function seamlessly as a single, contiguous digital source for an extraordinary music experience.

Other Features:

Allan Deviation: eE-12 (1 second)

Equivalent Jitter: 500 times less than an 82fs Femto (1Hz-10Hz)

Equivalent Phase Noise: -110 dBc/Hz at 1 Hz

Clock Frequency: 90.3168 Mhz

Output Level: 3.3V CMOS

Reference: Rubidium Atomic Generator

Oscillator: Temperature-controlled SC Crystal

Dimensions (WxDxH): 34x32x9.6 cm

Weight: 9.6 kg

Heating/on consumption: 30W/15W maximum