February 2025
What impact does reclocking with the MUTEC REF10 SE120 have?
The review by Grigg Audio Solutions focuses on the question of how an external master clock, such as the MUTEC REF10 SE120, can influence digital music playback.
Grigg Audio Solutions, a German company specializing in high‑end audio PCs and custom solutions for audiophile applications, regularly publishes expert articles and reviews on various audio topics. In one of their latest articles, they examine the fundamentals of digital audio playback and how the REF10 SE120 can enhance it.
MUTEC and the fis Audio PC
Our highly precise 10 MHz reference clock generator was integrated into a high‑end audio setup consisting of both a high‑end audio PC and a top‑tier DAC. I connected the MUTEC REF10 SE120 to the GUSTARD N18 PRO network switch (5x RJ45, 1x fiber optic). The fis audio PC receives data via the Solarflare X2522 network adapter through fiber optics and outputs audiophile DSD with room and speaker correction via the NanoPi NEO3 to the DAC over USB
, the tester explains. The goal was to objectively and subjectively assess the sonic differences with and without the reference clock.
It quickly became evident that, even in modern asynchronous audio systems, the quality of the incoming clock signal is crucial. The phase noise spectrum of the incoming signal can affect the local clock - especially in the low‑frequency range
, states the report. This is where the MUTEC REF10 SE120 excels, with its oven‑controlled crystal oscillator delivering exceptionally low phase noise.
Noticeable improvements in sound quality
The sonic effects were immediately noticeable. The testers observed improved bass definition, which was described as tighter and more controlled
. At the same time, instrument separation increased significantly, allowing every detail of the music to be heard clearly. The highs gained clarity without ever sounding harsh or fatiguing
, the author adds. Thanks to the precise clocking, the music playback became smoother, more fluid, and spatially accurate.
Interestingly, these improvements were not limited to complex music pieces but were also evident in simpler tracks. When the clock was removed during the test, the playback noticeably lost structure and naturalness
, which ultimately convinced the tester.
A clear conclusion
The report concludes that the REF10 SE120 is a worthwhile investment, particularly for audiophiles who seek the highest level of sonic precision. Clocks like the MUTEC REF10 SE120 may be highly specialized, but their sonic benefits are impressive in real‑world applications
, summarizes the reviewer from Grigg Audio Solutions.
Read the full test report on Grigg Audio Solutions.
Learn more about our reference clock generator and how it can optimize your system's sound quality: MUTEC REF10 SE120.