The Mutec REF 10 SE120 is a professional Master Clock in the 10MHz standard. It is used for clocking interfaces, converters and word clocks with a dedicated 10MHz input and improves audio quality by drastically reducing jitter and phase noise, especially in the low bass range. At the heart of the REF 10 SE120 is a hand-selected, oven-annealed crystal oscillator, which is powered by the surrounding architecture with near-perfect supply voltage. The Clock works absolutely stable even over a long period of time and with temperature fluctuations and is certainly one of the most accurate, if not currently the most accurate, on the entire market.