External clocking gives your DAC a timing reference more precise than its internal oscillator. When a DAC reconstructs an analog waveform from digital data, clock jitter (timing errors measured in picoseconds) smears transients, blurs imaging, and flattens the soundstage. A dedicated reference clock with a high-stability oscillator tightens that timing to near-zero jitter, letting the DAC resolve detail it was always capable of but never quite reached.
The SC-1 is a 10MHz reference clock built around an oven-controlled crystal oscillator with phase noise below -115dBc/Hz. It feeds a clean clock signal to the ND-1 DAC or NT-1 transport via BNC, locking the entire digital chain to a single master timebase. The aluminum chassis uses the same MA-DAMPER PRO isolation feet as the N-Series components.
