External 10MHz master clock built on an SC-Cut OCXO in a double insulated oven, with four isolated BNC outputs and selectable 50 ohm or 75 ohm matching. Frequency accuracy is within 3ppb and power comes from a dual stage linear supply with a supercapacitor array. Brand new, boxed, full manufacturer warranty. The SMSL G1 is an external 10MHz master clock for digital source components that accept a reference clock input. It is aimed at an owner who already has a converter, transport or streamer with a clock input and wants to feed all of them from one reference. It is finished in silver. This is brand new stock, supplied boxed with the full manufacturer warranty by Dreamcrest Audio as an authorised SMSL dealer. What it does Digital source components rely on an internal oscillator to decide exactly when each sample is read. A master clock replaces or disciplines that oscillator with a more stable external reference, and feeding several components from the same reference keeps them locked together. The G1 uses an imported SC-Cut 10MHz oven controlled crystal oscillator inside a double insulated oven, which holds the crystal at a constant temperature so that frequency drift stays within 3ppb. Four isolated BNC outputs let you clock a converter, a transport and a streamer at once, and output impedance can be set to 50 ohms or 75 ohms to match the receiving component. How it sounds and where it fits A master clock does not change tonal balance. What owners typically report is a steadier stereo image and a cleaner sense of decay, because sample timing errors are reduced. The effect depends heavily on how good the internal clock in the receiving component already is, so the G1 makes most sense in a system where two or three components share a clock input, rather than in a single box setup. Give it time to settle. SMSL state around two minutes to stabilise after power on and recommend about ten minutes of warm up, which the front panel countdown indicates. Key features Imported SC-Cut 10MHz OCXO in a dedicated double constant temperature oven Four isolated 10MHz reference outputs on BNC connectors Selectable 50 ohm or 75 ohm output impedance Dual stage low noise linear power supply with a toroidal transformer and a supercapacitor array Mains or external DC operation with adaptive automatic voltage switching Front panel warm up countdown indicator Aluminium chassis matching the 200mm wide SMSL components Technical specifications Clock outputs: 4 x BNC Output frequency: 10MHz Output impedance: 50 ohms or 75 ohms, selectable Output level: square wave, 3.3Vp-p Frequency accuracy: within 3ppb Frequency stability against temperature: within 3ppb Power supply: AC 100V to 240V, 50/60Hz, or DC 9V to 15V at 1A Power consumption: 12W while heating, 3W in normal use Operating temperature: 5C to 35C Dimensions: 200 x 47.9 x 186 mm. Weight: 1.618kg Frequently asked questions Will it work with my converter? Only if that component has a 10MHz clock input on BNC. The SMSL PL200T transport and the VMV D2R MKII converter both accept an external reference. How many components can it clock? Four, through its four isolated BNC outputs, each of which can be set to 50 ohms or 75 ohms. How long should I leave it on? SMSL state around two minutes to stabilise and recommend about ten minutes of warm up, shown by the front panel countdown. If you are not sure whether your source components can take a 10MHz reference, use the enquiry button on this page and tell us what you own.
Dreamcrest Audio Fidelity Ltd, Nicosia. Specialist hi-fi and high end audio, 20+ years in the audio business. Full details and photos: https://www.dreamcrestaudio.com/product/smsl-g1-external-master-clock-ocxo-10mhz-silver-brand-new/
