Perfect Time, Delivered: Soulnote X3 Master Clock

The Soulnote X3 Master Clock is the precision heartbeat for a reference digital system — a 10 MHz master clock generator built around an SC-Cut ultra-low-phase-noise OCXO (oven-controlled crystal oscillator). Where common TCXO clocks compromise, the X3's oven-stabilised OCXO delivers higher accuracy and impressively low phase noise, feeding your DAC, transport or streamer the stable timing reference that lets digital finally relax and breathe.

Chosen by Ear, Powered Like an Amplifier

Soulnote selected the OCXO not just for its measurements but for its sound. It's supported by a power supply worthy of an amplifier: a 200 VA toroidal transformer — the kind you'd find in a 100 W power amp — with ultra-high-speed SiC rectifier diodes and Soulnote's proprietary non-NFB discrete regulation for a robust, stable, low-noise current feed. Naked foil resistors adapted from artificial-satellite-grade ultra-high-precision components sit in the output stage.

Built to Isolate, Ready to Connect

The housing uses dual non-rigid top plates, isolated AC inlets and spike supports positioned directly under the transformer to keep vibration away from the timing. A single 10 MHz SMA output (50 ohms, 1.0 Vp-p) connects to any compatible component, and the X3 ships with an SMA–SMA clock cable, an SMA–BNC converter, spikes and a power cable.

Why You'll Love the Soulnote X3

• SC-Cut ultra-low-phase-noise OCXO — higher accuracy than common TCXO clocks
• Amplifier-grade power supply — 200 VA toroidal, SiC diodes, non-NFB regulation
• Satellite-grade foil resistors — ultra-high-precision output stage
• Serious vibration isolation — non-rigid top plates, spikes under the transformer
• 10 MHz SMA output — 50 ohms, 1.0 Vp-p, with SMA–BNC converter included
• Hand-built in Japan — Premium Silver or Premium Black, 7.5 kg

Frequently Asked Questions

What does a master clock like the X3 do?

It supplies a highly stable 10 MHz reference to a compatible DAC, transport or streamer, tightening the timing of digital conversion to reduce jitter — for a clearer, deeper, more natural sound.

Why an OCXO instead of a TCXO?

An oven-controlled crystal oscillator (OCXO) holds its crystal at a stable temperature for higher accuracy and lower phase noise than the temperature-compensated (TCXO) clocks common in audio.

How does it connect?

Via a single 10 MHz SMA output (50 ohms, 1.0 Vp-p). It includes an SMA–SMA cable and an SMA–BNC converter, so it connects to components using either standard.

Soulnote X3 Technical Specifications