SMSL G1 External Audio Master Clock
The S.M.S.L G1 is a reference-grade 10MHz master clock generator engineered to synchronize your high-end digital audio system. Digital audio lives and dies by clock accuracy. By providing a single, ultra-stable 10MHz timing reference to your DAC, digital transport, or network streamer, the G1 minimizes nanosecond-level jitter, banishes digital glare, and reconstructs a wider, deeper soundstage with pinpoint imaging and natural transients.
SC-Cut 10MHz OCXO Crystal Oscillator
At the heart of the G1 is an imported, communication-grade SC-cut 10MHz OCXO (Oven-Controlled Crystal Oscillator). Featuring an exceptional phase noise performance of -105 dBc/Hz at 1 Hz offset and frequency accuracy calibrated to within ±3 ppb (parts per billion), this precision timepiece virtually eliminates drift caused by ambient room temperature fluctuations.
Isolated Dual-Constant Temperature Chamber
To maintain absolute thermal equilibrium, the OCXO is housed within a dedicated, dual-constant temperature insulated chamber. This specialized thermal shielding protects the crystal from external micro-temperature swings and internal heat sources. Stable operating temperature ensures ultimate frequency stability, preserving micro-details and texture across your entire music library.
Quad-Channel Buffered 10MHz Outputs
The G1 is equipped with four independent, buffered 10MHz reference outputs via professional gold-plated BNC connectors. Each output delivers a robust 3.3Vp-p square wave with selectable 50Ω or 75Ω impedance matching. This allows you to synchronize multiple digital components—such as a DAC, transport, and streamer simultaneously—while preventing electrical signal reflections and timing distortion.
Ultra-Low Noise Power Supply with Supercapacitors
Power purity is vital for reference clocks. The G1 utilizes a premium Noratel toroidal transformer with extremely low magnetic leakage, backed by multi-stage LDO linear regulation and high-capacity super farad capacitors. This design creates a pristine, ultra-low 6 µVrms noise environment, isolating the oscillator from power grid fluctuations and ensuring dead-silent backgrounds.
Vibration-Damped CNC Aluminum Chassis
Housed in a solid, unit-body CNC-machined aluminum chassis, the G1 offers exceptional structural rigidity and passive mechanical damping. The heavy enclosure blocks external electromagnetic interference (EMI/RFI) and works with silicone feet to absorb desktop micro-vibrations, ensuring the internal oscillator performs in a completely stable mechanical environment.
Flexible Dual Power Modes
Designed for ultimate setup flexibility, the G1 supports dual power options. It features an internal automatic voltage-switching AC input (100V-240V) for global use, alongside a rear 9V-15V DC input that allows audiophiles to connect an external dedicated linear power supply for further performance tuning.
About SMSL
Foshan ShuangMuSanLin Electronics Co., Ltd. (SMSL) is an established manufacturer in high-fidelity desktop audio. Specializing in digital-to-analog converters, master clocks, headphone amplifiers, and power amps, SMSL has built a global reputation for combining rigorous bench performance, clean industrial design, and practical feature sets across various price tiers.
Technical Specifications
Clock Outputs: 4 x BNC connectors
Output Sample Rate: 10MHz
Output Impedance: 50Ω / 75Ω (Selectable)
Output Level: Square wave 3.3Vp-p
Frequency Accuracy: Within ±3 ppb
Phase Noise: -105 dBc/Hz (1 Hz offset)
Power Supply: AC 100V - 240V (Auto-switching) / DC 9V - 15V, 1A (5.5x2.1mm plug)
Power Consumption: During Heating: 12W, Normal Use: 3W
Stabilization Time: ~2 mins initial, ~10 mins recommended warm-up
Dimensions & Weight: 200 x 47.9 x 186 mm (W x H x D), 1.618 kg
Q&A
What is the primary function of the SMSL G1?
The G1 is a reference-grade 10MHz external master clock generator designed to synchronize digital audio devices like DACs and transports to eliminate jitter.
What type of crystal oscillator does the G1 use?
It employs an imported, communication-grade SC-cut 10MHz OCXO (Oven-Controlled Crystal Oscillator) housed in a dual-constant temperature insulated chamber.
How many devices can be connected to the G1 simultaneously?
It features four independent, buffered 10MHz BNC outputs, allowing you to connect up to four digital sources at once.
Does the unit support impedance matching for clock cables?
Yes, each output offers selectable 50Ω or 75Ω impedance matching to prevent signal reflections.
Can I use an external linear power supply with the G1?
Yes, in addition to standard AC power, it features a rear 9V-15V DC input for external linear power supplies.
