無 · Nothing But Time

Ten megahertz.
Kept warm on purpose.

The Soulnote X3 is a master clock built to do exactly one job — deliver a perfectly stable 10MHz reference — and nothing else.

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Soulnote X3 master clock generator, silver, front view
Soulnote X3 master clock generator, silver, front left angle view
Soulnote X3 master clock generator, internal power supply
Soulnote X3 master clock generator, rear panel
Soulnote X3 master clock generator, included accessories

Vendor:Soulnote

Soulnote X3 Master Digital Clock

$7,990.00
Color
Color: Premium Silver
In stock
Hear it at a dealer
Popular upgrades

Pairs well with

Hand-built in Japan. Every part chosen by ear.

無 Nothing in the way

mu — nothing added

Everyone adds.
Soulnote subtracts.

The best producers know the secret: the art is what you leave out. Soulnote engineers the same way — every stage a conventional design adds to the signal path is a chance to blur the original waveform, so Soulnote removes them, one by one, and tunes what remains by ear.

Between input and output: 3 extra stages, each with a fingerprint. Between input and output: almost nothing.

Every stage does a job — and leaves a fingerprint on the waveform as it passes through.

Fewer hands on the signal. What remains was chosen by listening — part by part.

Designed by subtraction

Less circuit.
More music.

10MHz

SC-Cut OCXO reference — held stable by an amplifier-grade power supply.

200VA

toroidal transformer — the scale of a 100W power amp, dedicated to one clock.

1output

a single 10MHz SMA out (50Ω, 1.0Vp-p) — nothing to configure, nothing to choose.

Technical specifications
TypeMaster clock generator
OscillatorSC-Cut ultra-low-phase-noise OCXO
Output1 × SMA, 10 MHz, 50 ohms, 1.0 Vp-p
RegulationProprietary non-NFB discrete
Power supply200 VA toroidal transformer, SiC rectifier diodes
IsolationDual non-rigid top plates, isolated AC inlet, spike supports
IncludedSMA–SMA cable, SMA–BNC converter, spikes, power cable
Weight7.5 kg
What does a master clock actually do?
It feeds a compatible DAC, transport or streamer a fixed 10 MHz reference, so the conversion runs on one steady timebase instead of its own internal clock. Jitter falls and the sound relaxes into place.
Why an OCXO instead of the usual TCXO?
An oven-controlled oscillator holds its crystal at one temperature, so accuracy and phase noise both improve over the temperature-compensated clocks common in audio. Soulnote chose the SC-cut OCXO by listening as much as by measurement.
What connects to it?
Any component with a 10 MHz clock input. The X3 has one SMA output at 50 ohms and ships with an SMA to SMA cable and an SMA to BNC converter, so both connector standards are covered.
About the Soulnote X3 Master Digital Clock

Availability: Ships in 10–15 business days.

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

Type Master clock generator
Oscillator SC-Cut ultra-low-phase-noise OCXO
Output 1 × SMA, 10 MHz, 50 ohms, 1.0 Vp-p
Regulation Proprietary non-NFB discrete
Power supply 200 VA toroidal transformer, SiC rectifier diodes
Isolation Dual non-rigid top plates, isolated AC inlet, spike supports
Included SMA–SMA cable, SMA–BNC converter, spikes, power cable
Dimensions (W × H × D) 430 × 111 × 376 mm
Weight 7.5 kg
Finishes Premium Silver or Premium Black
Made in Japan — Soulnote