Eversolo C10 Precision Master Clock

Take digital audio synchronization to the next level with the Eversolo C10, a high-precision master clock designed for premium Hi-Fi systems. Featuring a 10 MHz SC-cut oven-controlled crystal oscillator (OCXO), ultra-low phase noise, and four independently buffered BNC clock outputs, the C10 provides a highly stable timing reference for compatible digital audio components. Designed to complement the Eversolo T10 streaming transport, DAC-Z10, and DAC-R8, this advanced external master clock helps reduce timing inconsistencies and supports accurate digital audio processing.

At the heart of the Eversolo C10 is a custom SC-cut OCXO engineered for outstanding frequency stability and low noise. Its specialized crystal design offers reduced sensitivity to temperature fluctuations and mechanical stress, while oven-controlled temperature regulation maintains a consistent operating environment. With factory frequency accuracy within ±0.01 ppm, short-term stability better than 9E-13 over one second, and a phase-noise floor of ≤ -170 dBc/Hz, the C10 delivers an exceptionally stable reference signal for demanding audio systems.

Built for flexible system integration, the C10 features four independently buffered 50-ohm BNC outputs supporting 10 MHz, 25 MHz, 100 MHz, and multiple audio-specific clock frequencies. An SMB 1PPS reference input enables external frequency calibration, while the large 8.8-inch IPS touchscreen provides real-time monitoring of oscillator temperature, warm-up progress, operating status, and calibration. Housed in a premium aluminum-alloy chassis with a design that complements Eversolo's high-end components, the C10 is an ideal addition to a reference-level digital Hi-Fi system.

Specifications

• Product Type: High-precision external master clock
• Model: Eversolo C10
• Clock Source: 10 MHz SC-cut ultra-low-noise OCXO
• Oscillator Type: Oven-controlled crystal oscillator
• Crystal Design: SC-cut crystal
• Warm-Up Time: Within 5 minutes at 25°C
• Factory Frequency Offset: Less than ±0.01 ppm at 10 MHz, 25°C
• Temperature Stability: Less than 0.003 ppm from -20°C to +60°C
• Aging Rate: Less than 0.002 ppm per day
• Short-Term Stability: Less than 9E-13 at τ = 1 second
• Phase Noise at 1 Hz: ≤ -115 dBc/Hz
• Phase Noise at 10 Hz: ≤ -129 dBc/Hz
• Phase Noise at 100 Hz: ≤ -139 dBc/Hz
• Phase Noise at 1 kHz: ≤ -145 dBc/Hz
• Noise Floor: ≤ -170 dBc/Hz
• Clock Outputs: 4 independently buffered BNC outputs
• Output Impedance: 50 ohms
• Output Signal: Square wave
• Output Level: 1.8 Vrms
• Standard Output Frequencies: 10 MHz, 25 MHz, 100 MHz
• 44.1 kHz Audio Clock Family: 11.2896 MHz, 22.5792 MHz, 45.1584 MHz
• 48 kHz Audio Clock Family: 12.288 MHz, 24.576 MHz, 49.152 MHz
• External Reference Input: 1PPS via SMB connector
• Reference Calibration: Factory-calibrated for 1PPS timing
• USB Connection: USB 2.0 for firmware updates only
• Display: 8.8-inch IPS touchscreen
• Display Information: Warm-up status, oscillator temperature, operating status, and 1PPS calibration
• Chassis Material: Aluminum alloy
• Power Requirements: AC 100–120V or 220–240V, 50/60 Hz, auto-adapting
• Maximum Power Consumption: 20W
• Standby Power Consumption: ≤ 0.8W
• Dimensions (W x D x H): 365 x 310 x 88 mm with feet
• Height Without Feet: 78 mm
• Net Weight: 5.85 kg (approximately 12.9 lbs)
• Packaged Weight: 8.4 kg (approximately 18.5 lbs)
• Compatible Equipment: Eversolo T10, DAC-Z10, DAC-R8, and other devices with compatible external clock inputs
• Included Accessories: Power cable, 2 clock cables, user manual, and screen cloth

What It's Great At

• Ultra-Precise Clock Synchronization: Provides a stable external timing reference for compatible digital audio components, helping minimize clock-related timing inconsistencies throughout the signal chain.
• SC-Cut OCXO Technology: Combines a specialized SC-cut crystal with oven-controlled temperature regulation to maintain exceptional frequency accuracy and long-term stability.
• Ultra-Low Phase Noise: Achieves a noise floor of ≤ -170 dBc/Hz, helping provide a clean timing reference for demanding high-resolution digital audio systems.
• Four Independently Buffered Outputs: Connect up to four compatible digital audio components to a shared master clock using dedicated 50-ohm BNC connections.
• Flexible Clock Frequencies: Supports 10 MHz, 25 MHz, 100 MHz, and multiple audio-specific clock frequencies for integration with a variety of compatible equipment.
• External 1PPS Calibration: An SMB reference input accepts precision 1PPS signals for frequency calibration and improved long-term timing accuracy.
• Real-Time Touchscreen Monitoring: The 8.8-inch IPS touchscreen provides convenient access to oscillator temperature, warm-up progress, clock status, and calibration information.
• Premium Eversolo System Integration: Designed to complement components such as the Eversolo T10, DAC-Z10, and DAC-R8 for a coordinated high-end digital audio system.

FAQ Section

Q: What does the Eversolo C10 master clock do?
A: The Eversolo C10 supplies a highly stable external clock reference to compatible digital audio components. This helps maintain accurate timing and synchronization within a high-performance digital audio system.

Q: Will the Eversolo C10 improve sound quality?
A: The C10 is engineered to provide a precise, low-noise timing reference that may help reduce clock-related timing errors in compatible equipment. Audible improvements depend on the connected components, their clock architecture, and the overall audio system.

Q: Which Eversolo products are compatible with the C10?
A: The C10 is designed for use with compatible Eversolo components, including the T10 streaming transport, DAC-Z10, and DAC-R8. It can also work with other audio equipment that supports its external clock frequencies and connection requirements.

Q: How many devices can connect to the Eversolo C10?
A: The C10 features four independently buffered BNC clock outputs, allowing up to four compatible devices to receive a shared master clock reference.

Q: What is an SC-cut OCXO?
A: An SC-cut OCXO is an oven-controlled crystal oscillator that uses a specially cut quartz crystal to reduce sensitivity to temperature changes and mechanical stress. This design helps maintain extremely stable clock frequencies over time.

Q: Does the Eversolo C10 support multiple clock frequencies?
A: Yes. The C10 supports 10 MHz, 25 MHz, and 100 MHz output frequencies, along with audio-related frequencies for both 44.1 kHz and 48 kHz sampling-rate families.

Q: What is the 1PPS reference input used for?
A: The SMB 1PPS input allows the C10 to accept an external precision timing reference for frequency calibration. This helps maintain long-term clock stability when used with an appropriate external reference source.

Q: Can the Eversolo C10 play music or function as a DAC?
A: No. The C10 is a dedicated precision master clock and does not function as a music streamer, DAC, or amplifier. It supplies timing signals to compatible audio components and must be used alongside other equipment.