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ESOTERIC G-03X Master Clock Generator
G-03X Master Clock Generator
Ultimate digital experience - uniform digital audio system management by ultra precision clock device

Stereo Sound “2011-2012 Best Value Component”    Stereo Sound “2011-2012 Best Value Component”

Ultimate precision master clock generator vividly opens the "gray area" of soundstage, revealing the hidden passion of musical performance. The integration of 20 years of clock technology development, sound engineering and highly rigid chassis construction.

High precision crystal master clock oscillator core

The G-03X uses a high precision crystal oscillator (Accurate to ±0.1ppm). The G-03X is a younger sister of the flagship G-0Rb and is an evolutionary successor to the crystal clock generator model G-0. The G-03X has an OCXO (Oven Controlled Crystal Oscillator), circuit on board. The OCXO is a small thermostatic chamber used to heat the combination oscillator core and control circuits at a fixed, high thermal level. This provides stability to the crystal clock, being free from unwanted and characteristic variations. As a result, the G-03X is exceptionally stable at ±0.1 ppm, even within severe thermal environments ranging from -20 °C to 70 °C. The crystal master clock generator G-03X can be used with a wide range of digital source components with the same established product quality level achieved by the G-0.

Power supply equipped with large capacitors and highly quality R-core transformer

The G-03X uses a large R-core transformer to provide maximum performance in a newly designed low profile cabinet. Combined with high-speed Schottky barrier diodes, low-impedance, and smooth chemical capacitors and other unique power supply components, the power circuit design of the G-03X provides extremely stable electronic power to the internal circuitry.

Proprietary gold-plated BNC ports

The G-03X uses ESOTERIC's proprietary gold plated BNC ports, providing highly reliable electrical contacts. Furthermore, these ports are securely fastened to the rear panel so that they are robust enough to handle even the heaviest and thickest types of audiophile high grade BNC cable.

Mechanically inert and structurally refined for optimal performance

In the tradition of ESOTERIC's product line development, the G-03X housing is designed with high rigidity throughout. Thick aluminum exterior (front, top and side panels), and multiple internal reinforcement materials provide a very strong housing to minimize cabinet vibration and resonance. Three ESOTERIC exclusive pinpoint feet (patent pending), made of quenched steel, allow the unit to be completely stabilized during operation. Thanks to ESOTERIC's vibration and resonance free construction, the rigid housing blocks small vibrations which could affect clock precision, allowing the oscillator to operate at its full potential. The G-03X is manufactured with this highly rigid housing construction in a 2U height (90mm/3.5inch).

User-friendly interface

Easy operation of the G-03X is allowed by simply by pressing the buttons on the front panel. Equipment settings can be checked at a glance on high-quality LCD displays.

Three separate output systems

The G-03X has three separate output systems which can output 1×, 2×, and 4× multiples of the base frequency (44.1kHz/48kHz). G-03X has two output ports, making it possible to supply word clock signals to up to six different compatible devices. It is also possible to cancel the clock signal from any unused sub-system to prevent sound quality degradation due to unnecessary interference from active outputs.

Proprietary universal clock output

ESOTERIC developed a universal clock which serves as a new Word Sync format for A/V connections. The G-0s was the first product equipped with this universal clock. This universal clock is also included in the G-03X, and its sync signal can be supplied to compatible devices available from ESOTERIC. This function allows an ultra-precise oscillator to centrally manage everything from audio to video.

External 10 MHz signal input port

The G-03X has an input port capable of receiving a 10 MHz reference signal from an external component. This port can be connected with devices such as an ultra-precise cesium atomic oscillator as a "system upgrade," for special applications.

LCD Display panel

These new ESOTERIC model feature an LCD display panel specifically designed for a high level of visibility. The new LCD display has three brightness levels (plus display off mode) -- a useful feature in home theaters where excessive light is not desired. As in most audiophile electronics, an incremental audio improvement may also be achieved by "powering down" the LCD display during use.

Clock outputs 44.1kHz lines 44.1/88.2/176.4 kHz
48kHz lines 48/96/192 kHz
PAL FILM lines 46.08/96.16/184.32 kHz
Accuracy under ±0.1ppm (factory setting)
Terminals BNC coaxial
Stabilized time of the output clock 2minutes (until the oscillator is stabilized)
30seconds (until the FREQUENCY MODE selection is stabilized)
Frequency input Input 10MHz (under±10ppm)
Input level 0.5 to 1.0 Vrms/50ohm (Sine wave)
1.5 to 3.0 Vpp/50ohms (Rectangular wave)
Terminal BNC coaxial
General Power supply AC 230V 50Hz
AC 120V 60Hz
AC 220V 60Hz
Power consumption 12W (maximum)
7W (nominal)
External dimensions
442×97.5×353 mm
Weight 9.1kg (20lbs)
operation temperature range +5°C to +35°C
- Design and specifications are subject to change without notice.
- This product is available in three different power supply variations shown in the chart above. Make sure that the voltage shown on the rear panel matches the AC line voltage in your area.
- The shape of the AC inlet and plug of the supplied power cord depends on the voltage rating and destination country.

G-03X G-03X

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