Esoteric
Esoteric G-05 Master Clock
Best master clock for audiophiles seeking ultimate digital playback precision.
The Esoteric G-05 Master Clock Generator is engineered to elevate the sonic performance of your digital audio system. Featuring the proprietary "Master Sound Discrete Clock," this OCXO unit synchronizes connected digital players, including Esoteric's K and N series, for enhanced musicality. It utilizes a custom SXT-03 crystal oscillator and a sophisticated Master Sound TC temperature control system with 128-step heater control for exceptional stability. Three independent power supplies ensure optimal voltage delivery to each circuit, while the Esoteric-HCLD buffer circuit outputs a pure 10MHz sine wave through four dedicated terminals.
$5800.00
Owner Satisfaction
4.5
/ 5
Category Rank
143
/ 186
#143 in Electronic Oscillators
Price vs Category Average
+181%
Above average
Overall Dimensions (W×H×D)
380128350
/ × × mm (including protrusions)
Who it's for
- Audiophiles seeking maximum clarity and a natural soundstage
- System builders requiring perfect synchronization across multiple digital components
- Long-term investors looking to future-proof their high-end audio chain
Who should skip it
- Budget-conscious listeners prioritizing value over marginal performance gains
- Owners of digital gear lacking dedicated external clock inputs
- Casual listeners using systems with limited resolution or internal clocking
Performance breakdown
Clocking Precision
Industry-leading frequency stability ensures near-perfect synchronization for high-end digital audio.
Thermal Stability
Advanced 128-step heater control maintains optimal crystal temperature for consistent performance.
Build Integrity
Substantial ten-kilogram chassis provides excellent vibration damping and structural rigidity.
Signal Purity
Esoteric-HCLD buffer circuitry delivers an exceptionally clean 10MHz sine wave output.
Power Isolation
Three independent power supplies effectively eliminate cross-circuit interference for cleaner signals.
System Versatility
Four dedicated BNC terminals allow for simultaneous synchronization of multiple digital components.
Key Specs
Overall Dimensions (W×H×D)
380 × 128 × 350mm (including protrusions)
Weight
10.0kg
Output Frequency
10MHz
Frequency Precision
Within ±0.01ppm (when shipped new)
Connectors
BNC × 4
Output Level
Sine wave 0.5 ±0.1Vrms / 50Ω
Power
AC 120V, 60Hz / AC 220-240V, 50/60Hz
Power Consumption
10W (when stable)
Features
- Enhances the musical expression of connected digital audio sources.
- Features the proprietary "Master Sound Discrete Clock" for high-precision music reproduction.
- Utilizes a custom SXT-03 large crystal oscillator with ideal electro-physical properties.
- Employs a unique Master Sound TC total temperature control system with multi-stage heater control.
- Incorporates three independent power supplies for optimal voltage delivery to each circuit block.
- Equipped with an Esoteric-HCLD buffer circuit for a pure 10MHz sine wave output.
- Provides four 10MHz sine wave clock output terminals.
What customers say
Customers consistently praise the Esoteric G-05 Master Clock for its exceptional contribution to audio system performance. Reviewers frequently highlight the profound improvement in soundstage clarity, precision, and overall musicality, attributing a new level of realism to their listening experience. The device's exquisite build quality and sophisticated design are also recurring themes, reflecting Esoteric's commitment to high end craftsmanship. While a significant investment, enthusiasts often perceive its transformative sonic impact as justifying the premium price, underscoring its perceived value within the audiophile community.
Know before you buy
The G-05 acts as a high-precision timing reference for your digital components. By synchronizing your digital players to its ultra-stable 10MHz signal, it reduces jitter and allows your equipment to process audio data with greater accuracy, resulting in improved musicality and soundstage depth.
Crystal oscillators are sensitive to temperature fluctuations, which can cause timing errors. The G-05 uses a 128-step heater control system to maintain the SXT-03 crystal at a constant, optimal temperature, ensuring the clock remains stable and precise regardless of the environment.
Yes, the G-05 is equipped with four independent BNC output terminals. This allows you to provide a master clock signal to up to four compatible digital devices, such as a CD player, network streamer, and DAC, simultaneously.
The G-05 outputs a standard 10MHz sine wave, which is compatible with many high-end digital audio devices that feature a 10MHz clock input. However, you should verify that your specific equipment accepts a 10MHz sine wave signal via a BNC connection.
By utilizing three separate power supplies, the G-05 prevents electrical noise and interference from one circuit block from affecting the others. This isolation ensures that the sensitive oscillator circuit receives clean, stable power, which is critical for maintaining high frequency precision.
Yes, because the unit relies on a temperature-controlled crystal oscillator, it performs best once the internal heater has reached its stable operating temperature. We recommend allowing the unit to warm up for a short period after powering it on to ensure the clock signal is at its most precise.
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