TEAC CG-10MX
TEAC master clock generator with thermostated OCXO oscillator, delivering a high-precision 10 MHz signal to a compatible DAC or digital player.
Description
The TEAC CG-10MX is an external master clock generator designed to supply a 10 MHz reference signal to compatible digital devices: DAC, network players, CD or Super Audio CD players, digital transports. Rather than a component of the playback chain itself, it is a companion device that synchronises the internal clock of connected equipment to a stable external reference.
The heart of the unit is an OCXO-type (Oven Controlled Crystal Oscillator) quartz oscillator, housed in a thermostated chamber to limit frequency drift caused by temperature. The stated specifications are a temperature stability of ±3 ppb and a frequency accuracy of ±0.1 ppm at the factory output, with a clock stabilisation time of two minutes after power-on. The signal is delivered as a sine wave at a level of 0.5 Vrms, with an output impedance of 50 Ω, via four gold-plated BNC connectors, allowing up to four devices to be fed simultaneously. Power comes from a toroidal transformer, intended to provide the stable current required for the precision of the clock delivered.
This type of device is aimed at users who already own a DAC, network player or CD/SACD player accepting a 10 MHz external clock input, and who wish to explore the benefit of an external frequency reference on their digital setup. It therefore concerns systems already built around a quality digital source, rather than general-purpose use.
Technical specifications
| Clock outputs | BNC × 4 (gold-plated) |
| Output sampling frequency | 10 MHz |
| Output impedance | 50 Ω |
| Output level | 0.5 Vrms (sine wave) |
| Clock stabilisation time | 2 minutes |
| Frequency temperature characteristic | ±3 ppb |
| Frequency accuracy | ±0.1 ppm (at factory output) |
| Operating power | 220-240 V AC, 50 Hz |
| Power consumption | 15.8 W (warming up), 10.8 W (stable) |
| Operating temperature | +5°C to +35°C |
| Dimensions (H × W × D) | 8.45 × 29 × 24.87 cm |
| Weight | 3.6 kg |
What to check before buying used
Check that the clock reliably reaches its two-minute stabilisation time and that the four BNC outputs deliver a constant level of 0.5 Vrms, without any drop on one of them that would indicate a worn connector or solder joint. The critical component remains the thermostated OCXO oscillator: a unit that has undergone prolonged storage in cold conditions or repeated mains interruptions may see its accuracy drift from the original ±0.1 ppm. Also check the toroidal transformer, which is prone to humming after several years of continuous use.
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