Black Lion Audio Micro Clock mkIII XB Word Clock
The Micro Clock mkIII XB is Black Lion's high-end master clock, built around high-quality crystal oscillators and galvanic isolation to hold BNC output jitter to 0.6 pS RMS, under a third of what the standard Micro Clock delivers. That tighter timing reference translates directly into a cleaner, more focused stereo image from every converter locked to it.
Outputs cover six BNC word clock connections, an XLR AES output, an RCA S/PDIF, and an optical S/PDIF, with BNC supporting sample rates from 44.1 kHz up to 384 kHz. It runs on a compact 9 VDC, 6-watt supply through a 2.1 mm center-positive barrel connector, in a small chassis that fits into a crowded rack.
| Jitter | 0.6 pS RMS at BNC outputs |
|---|---|
| BNC Outputs | 6, 75 Ohm, 5V unterminated |
| AES Output | 1 x XLR, 110 Ohm balanced |
| S/PDIF Outputs | 1 x RCA (75 Ohm), 1 x optical |
| Sample Rates (BNC) | 44.1 - 384 kHz |
| Dimensions / Weight | 6.5 in L x 6 in W x 1.75 in H; 2.2 lbs |
| Power | 9 VDC, 6W, 2.1mm center-positive barrel |








