Nothing to see here !! Vanishing levels of jitter artifacts all way below the threshold of hearing. A truly impressive result !
J-test S/PDIF input with expanded frequency scale - we see a very clean spectrum with some very minor side-bands all way below the threshold of hearing !
To put these results into perspective it is useful to compare to other Sabre DAC designs such as the Benchmark DAC3 considered to be defacto reference in the industry. From the review of the Benchmark DAC3 on the
ASR website we can see that the Ultimate Preamplifier displays lower sideband components and very similar noise floor compared to the Benchmark-3 DAC (once the reference levels are taken into account)


And the not so impressive test of the DEQX Pre-mate from
Stereophile 