SMSL G1 External Master Clock Generator with OCXO Oven-Controlled Crystal Oscillator and CK-03 Circuit

Regular price: $4,230.62
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Sale price: $4,230.62

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Product Highlights

SC-Cut OCXO crystal oscillator with +/-3 ppb accuracy and -105 dBc/Hz phase noise

Four independent buffered 10 MHz BNC outputs with 3.3 Vp-p square wave

Constant-temperature protective chamber for absolute timing stability

Precision linear power supply with imported toroidal transformer

Ultra-low 6 microvolt noise environment for the OCXO and LDO regulation circuits

CNC-machined aluminum alloy chassis with integrated heat-dissipation structure

Seamless system integration with SMSL T2 CD Transport, D2R DAC, and P2 Amplifier

Also compatible with the SMSL 200 Family Concerto system for complete synergy

Precision Timing for the Ultimate Digital Front End

The SMSL G1 is a dedicated external master clock generator designed to elevate the performance of high-end DACs, CD transports, and digital audio systems. Built around an ultra-precision OCXO (Oven-Controlled Crystal Oscillator) and SMSL's proprietary CK-03 clock processing circuit, the G1 delivers a 10 MHz reference signal with exceptionally low phase noise, transforming the timing accuracy — and consequently the soundstage depth, image focus, and high-frequency clarity — of any compatible digital component.

OCXO: The Gold Standard in Clock Stability

At the heart of the G1 is a laboratory-grade OCXO module. Unlike standard TCXO (Temperature-Compensated) clocks, an oven-controlled oscillator maintains its crystal at a constant elevated temperature inside a miniature oven, virtually eliminating frequency drift caused by ambient temperature fluctuations. The result is short-term and long-term frequency stability that no conventional clock can match — critical for preserving the precise timing relationships that define stereo imaging and transient accuracy.

CK-03 Clock Processing Circuit

SMSL's self-developed CK-03 circuit provides ultra-low-jitter clock distribution with multiple galvanically isolated output stages. By slashing phase noise and preventing ground-loop contamination between connected devices, the CK-03 ensures that the pristine 10 MHz reference generated by the OCXO reaches your DAC or CD transport completely intact.

Quad 10 MHz Outputs with Independent Isolation

The G1 features two 50-ohm BNC clock outputs, each galvanically isolated from one another. This allows you to simultaneously clock up to four separate devices — for example, a DAC and a CD transport — without cross-contamination. Both outputs deliver a clean 10 MHz sine wave with industry-standard 50-ohm impedance, making the G1 compatible with a wide range of high-end digital components from SMSL and other manufacturers.

CNC-Unibody chassis with Advanced Vibration Control

The G1 is housed in a precision CNC-machined aluminum unibody that minimizes internal resonance while providing effective EMI shielding. A suspension-based internal mounting system combined with silicone damping feet further isolates the sensitive OCXO module from environmental vibration — because at this level of timing precision, even microphonic interference matters.

Intuitive Status Display

A clear front-panel display shows real-time clock status, output activity, and warm-up progress. The OCXO reaches optimal temperature stability within minutes of power-on, with visual confirmation when the clock is fully locked and ready.

Reference-Level Build for Reference-Level Systems

Every component inside the G1 — from the OCXO module to the isolated output transformers — has been selected for one purpose: preserving the absolute integrity of the 10 MHz reference signal. If you have already invested in a high-performance DAC, adding the G1 is one of the most meaningful upgrades you can make to your digital playback chain.

Specifications