SIMAUDIO MOON NEO 260D

摘要

Marketed as a 'CD transport with optional DAC the true potential of Simaudio's Neo 260D is only realised with the latter in tow, upon which it becomes a state-of-the-art USB DAC complete with a legacy CD drive. Both RCA and XLR outputs offer the same 1.96V at OdBFs, regardless of source, and all three (CD, S/PDIF and USB) provide an equivalent 109dB A-wtd S/N ratio. This is because, as usual, the DAC (a Burr-Brown PCM 1795) and analogue output stage are the final arbiters of analogue performance, here dictating the wide 122dB midband stereo separation, the +0.0/-0.12dB response (20Hz-20kHz) and low 0.0004-0.0005% distortion (also 20Hz-20kHz) at 0dBFs. There are fractional differences in distortion at lower digital levels between CD, USB and S/PDIF sources [see Graph 1, below] but it's as well to remember there are bigger differences between L and R channels. Of course, only the S/PDIF and USB inputs handle 96kHz and 192kHz media, the respective responses stretching out to -1.4dB/45kHz and -4.9dB/90kHz.