Esoteric G-01 Master Clock Generator New support for 10 MHz and 22.5792 MHz high precision Rubidium oscillator

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Master clock generator equipped with ultra high precision rubidium oscillator,
Digital audio synchronized to one high precision master clock,
New support for 10 MHz and 22.5792 MHz master clock outputs.

Talk of flawless sound produced by an audio system connected together with a high precision
master clock has been circulating between high-end audiophiles in various forms. As an example,
the three dimensional effect of the sound stage gives the listener an actual feel of the high ceiling of
a concert hall in addition to the width and depth of the original performance. The listener is
treated to a pure and focused image of the playback sound that gives a sense of reality as if one
could reach out and touch it. When the final note of the musical instrument fades away, you
almost perceive the gradual silence like the color of a dark veil. This is truly an ultimate
achievement of audio playback that “conveys music” so close to the original sound it leaves an
unforgettable impression on the listener.

With the aim of enhancing the true potential of ESOTERIC digital players, the clock generator
“G Series” was redesigned as a new generation of devices with improved functionality, power and
flexibility.

The G-01 uses a high precision Rubidium oscillator with a frequency precision of ±0.05 ppb
(parts per billion) or ±0.00005 ppm which provides optimum stability as an audio clock. This
next generation clock generator supports master clock outputs of 10 MHz and 22.5792 MHz.

The Features

Master clock generator

 Every digital
audio device operates with an internal circuit generating the clock
signals, or heartbeat, required to operate that device. This master
generator is an extremely stable oscillator that supplies external
clocks to digital devices (such as a transport, D/A convertor, Super
Audio CD player) equipped with clock input terminals. The master clock
generator supplies clock signals with a higher degree of purity and
stability than clocks generated internally by digital devices and vastly
improves the sound quality. By operating connected devices off the
same highly stable master clock, timing errors called jitter are
virtually eliminated greatly improving imaging and dimensionality while
darkening the background.

Ultrahigh precision rubidium oscillator installed as the heart of the unit

 An American-made
rubidium oscillator with a frequency precision of ±0.05ppb＝±0.00005 ppm
is used as the core of this extraordinarily accurate timing device. This
oven-controlled oscillator significantly improves the performance of the
clock generator. This oscillator module has been manufactured to
ESOTERIC’s demanding specifications with sound quality and stability
being given top priority. The sound quality one would expect from our
best model in the master clock generator series has been achieved.

Newly-designed discrete clock output driver circuit configuration

 G-01 has adopted a
newly-designed discrete clock output driver circuit configuration. The
circuit uses an ultra high-speed transistor that is optimal for
generating digital waveforms for which ultrafast speed and a high degree
of accuracy are required. Combined with a heavy-duty power supply, this
circuit contributes to major improvements in sound quality by providing
an accurate, stable timing signal to audio devices.

Power section with sufficient capacity

 The G-01 clock
generator has a powerful power supply section that supports its basic
performance. Three power supply circuit boards, a total of 15 power
supply regulators, and independent power supplies for each circuit block
have been installed to minimize mutual interference between circuit
blocks and to supply clean energy to all parts. A large toroidal
transformer, which enables highly efficient and high power actuation, is
used as the main component in the power supply which is essential to the
sound quality. An El core transformer is used in the display section. A
series of multiple capacitors are used for a ripple filter circuit and
Schottky barrier diodes are used for quick response supporting fast
digital processing which assists the accuracy of the clock’s signal
generation.

10MHz clock and 22.5792MHz master clock outputs

 G-01 can output a
10 MHz clock (sine wave or square wave) as well as 22.5792 and 24.576
MHz master clocks that are compatible with ESOTERIC’s original “Direct
Master Clock Link.”

Three separate output systems

 G-01 can output
100 kHz and 10 MHz (sine wave) in addition to clock signals of 1x, 2x,
4x, and 512x multiples (22.5792 MHz/24.576 MHz) of the base frequency
(44.1 kHz or 48 kHz) from three separate A/B/C output sections.
Moreover, in frequency expansion mode (EXP), G-01 can output 8x, 16x,
32x, 64x, 128x, and 256x multiples of the clock frequency that enables
it to supply clock signals to a wide range of devices, including
professional audio or video equipment.

Each of these systems has two output ports supplying clock
signals to a maximum of six devices. The output frequency can be set
individually for each of the six ports from A1 to C2. If a single device
is connected, all output ports other than the A1 port can be turned
off. This feature has been added to avoid deterioration of sound quality
occurring through unnecessary inter-component interference.