{"product_id":"mutec-ref10-b","title":"MUTEC REF10 Master Clock","description":"\n\u003cp\u003eThe MUTEC REF10 is an audiophile reference master clock generating 10 MHz signals with industry-leading low phase noise (i.e. jitter) to significantly improve digital playback systems. As the conductor of your digital audio orchestra at home, the REF10 will inspire you with unheard-of clarity, graceful dynamics, and pure music. It is the most flexible, most compatible 10 MHz clock on the market allowing you to spend less time worrying about integration and leaving you with more hours to enjoy blissful playback.\u003c\/p\u003e\n\n\n\n\u003ch3\u003e\u003c\/h3\u003e\n\u003cp\u003eUnlock a more dynamic, more transparent sound stage with exceptional spatiality and level of detail, free from any digital blur. For all music enthusiasts reaching for the pinnacle of signal purity, audio quality, and clock precision, the REF10 is the must-have expansion to conduct your digital playback chain.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAudiophile 10 MHz reference generator with industrys lowest phase noise\u003c\/li\u003e\n\u003cli\u003eImproves and enhances compatible DACs, audio re-clockers, music servers, and master clocks\u003c\/li\u003e\n\u003cli\u003eEngineered around a handcrafted, ultra-low phase noise OCXO made in Germany\u003c\/li\u003e\n\u003cli\u003eGenerates a very high slew-rate square wave signal for superior lock precision compared to the sine wave signals used by competing brands\u003c\/li\u003e\n\u003cli\u003eProvides simultaneous reference outputs with 50 and 75  impedance for maximum compatibility with clocks and DACs by other manufacturers\u003c\/li\u003e\n\u003cli\u003eEight galvanically isolated, individually switchable BNC clock outputs\u003c\/li\u003e\n\u003cli\u003eRevolutionary, sub-Hz optimized, lowest noise power supply for every circuit section\u003c\/li\u003e\n\u003cli\u003eIntegrated, highest-quality international linear power supply\u003c\/li\u003e\n\u003cli\u003eHighly efficient power line filtering\u003c\/li\u003e\n\u003cli\u003eIntuitive user interface with noble aesthetics\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eThe Story of the REF10\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eCurrently available digital converters, master clocks, and audio re-clockers perform acceptably when reproducing or processing digital audio. Even so, we at MUTEC felt that existing solutions fall short of delivering the full potential of audio productions. In our commitment to advancing the state of the art and science we set out to investigate the possibilities to further enhance the performance of digital audio systems. To do so, we recruited one of Germanys most renowned RF engineers to join our R\u0026amp;D team. Together we developed a master clock generator with a technical performance beyond what we thought could be possible. The effects of the technical performance were then verified by a group of experience audiophile beta testers to ensure that the high-end performance translates to best-in-class sound.\u003c\/p\u003e\n\u003cp\u003eThe final result of our extensive efforts is the REF10: a superior 10 MHz reference master clock and our first Empyreal Class product combining uncompromising engineering with the beauty of simplicity and the utmost clock precision.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDebunking the \"Atomic\" Myth\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOur research has shown that the high clock stability of so-called \"atomic clocks\" based on a rubidium or cesium oscillator is limited to the long-term time domain. This long-term stability refers to the amount the absolute clock frequency (10 MHz, or 10 million cycles per second, in this case) drifts over time. While this long-term stability may be useful for some telecommunications applications, it is essentially irrelevant for digital audio purposes. Ultimately, it is the timing from one sample to another as a digital audio stream is transferred from one device to another that needs to be as precise as possible for best sound quality. Fluctuations in short-term stability are measured as jitter or phase-noise and are central to the audiophile performance of any digital audio device.\u003c\/p\u003e\n\u003cp\u003eIn contrast to these \"atomic clocks\" then, the REF10 is engineered around MUTEC's handcrafted, oven-controlled oscillator (OCXO) made in Germany, featuring highest clock stability in the time domain relevant for audiophile digital audio performance.\u003c\/p\u003e \u003ch3\u003e\u003cstrong\u003eExceptional Design\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eA well laid-out main power supply constitutes the basis for exceptional high-end products. To meet this requirement, we specifically designed for the REF10 a dual linear power supply based on a German made toroidal transformer. It provides a dedicated transformer winding for the sensitive OCXO that is completely isolated form the surrounding circuit. Networks of lowest-ESR (equivalent series resistance) capacitors made by Panasonic ensure best interference suppression for the supply voltages. Hereafter, sub-Hz optimized, lowest-noise voltage sources arranged in multiple stages independently supply every part of the circuit to avoid mutual interference. However, for the heart of the REF10, MUTECs handcrafted OCXO, we had to go even further. We developed a dedicated power source of such incredibly low noise that even our engineers themselves were amazed by the noise figures and the resulting oscillator performance we ultimately achieved. Consequently, we then developed unique ultra-low noise clock distribution and amplification circuits, which successfully transfer the oscillators reference signal to the REF10s eight outputs with virtually no losses.\u003c\/p\u003e\n\u003cp\u003eBased on our knowledge of the importance of a clock signals rise time (steepness of the edge) for the audio performance, we chose a very high slew-rate, lowest ripple square wave signal for the REF10. In contrast to the low slew-rate sine wave signals used by competing brands, this leads to superior lock precision and therefor minimized jitter at the receiving end. As a result, connected devices like DACs (D\/A converters) and audio clocks will sound even better.\u003c\/p\u003e\n\n\u003cp\u003eAn often discussed topic among audiophiles are the negative influences of RF (radio-frequency) interference in digital audio. In order to shield the REF10 from such RFI and other interference we are placing the circuit boards in a 1.5 mm thick steel enclosure, which isolates the sensitive electronics from outside electrical disturbances. We intentionally refrained from using an aluminum case popular with other manufacturers. An aluminum case would perhaps have lent a more esoteric look to the REF10, but it would have seriously degraded the shielding characteristics allowing RF interference to directly increase noise and jitter of the clock signal.\u003c\/p\u003e\n\u003cp\u003eRF interference can also enter the circuitry via the mains power connection. To avoid an power line interference as best as possible, we have equipped the REF10 with one of the best premium, brand-name power entry modules currently available. This module offers enhanced low frequency filtering and superior EMI immunity. As part of its mechanical design there are no open, unfiltered power cables inside the unit unlike many other products on the market.\u003c\/p\u003e\n\u003cp\u003eTo especially minimize the susceptibility to hum caused by ground loops we have designed the REF10 with galvanically isolated output stages. Every BNC reference clock output can be switched off individually so that only the currently desired outputs for a given setup need to be active. This feature further adds to our measures to keep mutual interference and system load as low as possible.\u003c\/p\u003e \u003ch3\u003e\u003cstrong\u003eOne Clock to Rule Them All\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe REF10 is the most flexible, most compatible 10 MHz clock on the market allowing you to spend less time worrying about integration and leaving you with more hours to enjoy blissful playback. Due to its ultra-low noise characteristics and its unrivaled flexibility the REF10 can enhance the audio quality of compatible D\/A converters (DACs) and re-clockers, music servers, and audio clocks to the highest possible level. It is the perfect match and ideal upgrade for MUTEC's 10 MHz ready products like the MC-3+ and MC-3+USB Smart Clocks, as well as the iClock and iClock dp.\u003c\/p\u003e\n\n\n\u003ch3\u003e\u003cstrong\u003eWith MUTEC to \"heavenly\" sound!\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eWithin the Empyreal Audio Class series, MUTEC offers special digital audio devices dedicated to the demanding users of top-quality hi-fi stereo systems. These unique products benefit from MUTEC's decades of expertise in the field of professional studio technology. This knowledge flows into the development of audiophile tools that have outstanding sonic abilities.\u003c\/p\u003e\n\u003cp\u003eA MUTEC Empyreal Audio Class component always focuses on features most relevant for authentic sound reproduction in a high-end audio system. Decorative accessories or cluttered front plates are alien to these devices. Therefore, the operation is designed to be user-friendly and convenient. On the outside, the series is characterized by functionalism combined with simple elegance. Internally, the highest level of technical precision can be found based on best available materials. Both aspects support the conceptual goal of the Empyreal Audio Class: pure concentration on what is technically essential.\u003c\/p\u003e\n\u003cp\u003eAll MUTEC devices of the Empyreal Audio Class series represent long-term investment because of their highest quality at all levels - of course \"Made In Germany\".\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003e\u003cstrong\u003eInterfaces\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e2 x 10 MHz reference clock BNC output, 50  terminated, unbalanced\u003c\/li\u003e\n\u003cli\u003e6 x 10 MHz reference clock BNC output, 75  terminated, unbalanced\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eSignal Format of all Clock Outputs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eSquare wave, 10.000 MHz, 2 Vpp, 50:50 duty cycle\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eClock Generation\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: 10.000 MHz ultra-low noise oven-controlled crystal oscillator\u003c\/li\u003e\n\u003cli\u003eFQ stability when shipped: \u0026lt; +\/-0.01 ppm\u003c\/li\u003e\n\u003cli\u003eFQ stability vs. temperature range: \u0026lt; +\/-0.01 ppm within -20 °C to +70 °C (-4 °F to +158 °F)\u003c\/li\u003e\n\u003cli\u003eShort term stability (Allan deviation) at Tau = 1 s: 1 x 10-12 (typically)\u003c\/li\u003e\n\u003cli\u003eAging after 30 days operation: \u003cbr\u003e\u0026lt; +\/-0.0002 ppm (per day), \u003cbr\u003e\u0026lt; +\/-0.03 ppm (1st year), \u003cbr\u003e\u0026lt; +\/-0.2 ppm (10 years)\u003c\/li\u003e\n\u003cli\u003eWarm-up time at +25 °C (+77 °F) : \u0026lt;5 min\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e\u003cstrong\u003ePhase Noise, Measured at REF10s Outputs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003ca\u003e\u003cimg\u003e\u003c\/a\u003e\u003cbr\u003e\u003csmall\u003ePhase noise of the REF10 as a function of frequency\u003c\/small\u003e\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePhase noise\u003c\/td\u003e\n\u003ctd\u003edBc\/Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1 Hz:\u003c\/td\u003e\n\u003ctd\u003e -116\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10 Hz:\u003c\/td\u003e\n\u003ctd\u003e -145\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e100 Hz:\u003c\/td\u003e\n\u003ctd\u003e -160\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1000 Hz:\u003c\/td\u003e\n\u003ctd\u003e -166\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNoise floor:\u003c\/td\u003e\n\u003ctd\u003e -170\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eJitter Performance, Measured at REF10s Outputs\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003e1-100 Hz:  22 fs\u003c\/p\u003e\n\u003cp\u003e\u003ca\u003e\u003cimg\u003e\u003c\/a\u003e\u003cbr\u003e\u003csmall\u003eJitter performance of the REF10\u003c\/small\u003e\u003c\/p\u003e\n\u003cp\u003e\u003csmall\u003eDisclaimer: All measurement figures represent average values. Minor production related deviations will be expected.\u003c\/small\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003ePower Supply\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eType: internal dual linear power supply\u003c\/li\u003e\n\u003cli\u003eInput Voltage: 90-125 V \/ 200-240 V, 50-60 Hz\u003c\/li\u003e\n\u003cli\u003ePower consumption: 12 W during oscillator warm-up, 8 W nominal operation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eMechanical Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCover size\/material\/color: 196 x 84 x 300 mm (W x H x D, without connectors and case feet), 1,5 mm steel, black powder-coated\u003c\/li\u003e\n\u003cli\u003eFront panel size\/material\/surface\/color: 198 x 88 x 8 mm (W x H x D), aluminium, anodized incl. anodic printing or silk screening, aluminium- or black-colored\u003c\/li\u003e\n\u003cli\u003eWeight: approx. 4350 g (9 lb, 9.5 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n","brand":"MUTEC","offers":[{"title":"Silver","offer_id":52739905487114,"sku":"MUTEC-2361","price":3290.0,"currency_code":"GBP","in_stock":true},{"title":"Black","offer_id":52739905519882,"sku":"MUTEC-2362","price":3290.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0917\/3283\/6618\/files\/mutec-ref10-master-48819-p.jpg?v=1773933677","url":"https:\/\/audioemotion.co.uk\/products\/mutec-ref10-b","provider":"Audio Emotion Limited","version":"1.0","type":"link"}