Esoteric G-25U User Manual

D00864900A

G-25U

Master Clock Generator/Up-converter

Owner’s Manual

Features

Up converter function

G-25 has the very highly accurate internal crystal master clock and ESOTERIC original DSRLLⅢ circuit.
This reduces the audible frequency digital jitter to less than 1/100 level. Even though the connected
component has no WORD SYNC IN terminals, The G-25U can provide highly accurate digital signals
regenerated by the internal crystal clock. The signal is convertible up to 192kHz. By the highly accurate
crystal master clock and DSRLLⅢ circuit, the air around the music is accurately reproduced; the
extraordinary ambience and clarity are realized.

Digital selector

The unit has 3 systems of the digital audio input that can be connected to digital devices like CD player,
DVD player and TV tuner etc. 4 systems of output are equipped.
Digital audio input connectors are RCA1/RCA2/OPTICAL terminals. The highly accurate digital audio signal
can be supplied by the highly accurate clock; the decrease of the jitter with DSRLLⅢ and up-conversion
function etc.
Output connectors are XLR1/XLR2,RCA,OPTICAL. XLR1 and XLR2 are Dual mode/Single mode and
output signal format is s/PDIF, AES3 DUAL.

Clock generator function

The high precision crystal clock that generates the excellent thermal quality(±1.0ppm/0℃～50℃) and is
strictly adjusted at the frequency precision ±1.0ppm is used.
The word clock to be the basis of external component is produced by the high precision crystal clock. The

fundamental frequency of master clock is either 44.1kHz or 48kHz. The 3 word signal output
terminals(A/B/C) can output x1/x2/x4 of 44.1 or 48kHz frequency signals. Each terminals can output
different frequency signals individually according to the connected component.

Word sync

Synchronization with the external Master Clock Generator
Internal crystal clock can be synchronized with the external higher-precision word clock signal I.e. the signal
from Rubidium clock generator: G-0s.

Design and body

The high rigid body construction combined with the elegant styling
The 2mm thick steel chassis and the 15mm aluminum are used. The chassis is supported by three pinpoint
feet. They can maximize the potential of crystal clock by allowing the unit to be mechanically isolated from
internal and external vibrations those affect the accuracy of the clock. The height is 2U(90mm) size. The
front panel is designed to be highly elegant with brushed finish, contribute to the sense of quality found in
ESOTERIC higher price models.

User-friendly operation

All the function is accessible from the front panel by pressing buttons. The front panel is easy to see how
the setting is now.

The ESOTERIC original gold plated terminals

BNC/RCA/XLR terminals: the ESOTERIC original 24k gold plated terminals are used. These ports are
securely fastened to the rear panel to provide very reliable electrical contact and they are robust enough to
handle the attachment of even the heaviest audiophile high grade cabling.

Before Use

What’s in the box

Please confirm that the following accessories are in the box when you open it.

Power cord x 1
Felt x 3
Warranty card x 1
Owner's manual x 1

Read this before operation

・ As the unit may become warm during operation, always leave sufficient space around the unit for

ventilation.

・ The voltage supplied to the unit should match the voltage as printed on the rear panel. If you are

in any doubt regarding this matter, consult an electrician.

・ Choose the installation location of your unit carefully. Avoid placing it in direct sunlight or close to

a source of heat. Also avoid locations subject to vibrations and excessive dust, heat, cold or
moisture.

・ Do not place the unit on the amplifier/receiver.
・ Do not open the cabinet as this might result in damage to the circuitry or electrical shock. If a

foreign object should get into the unit, contact your dealer or service company.

・ When removing the power plug from the wall outlet, always pull directly on the plug, never yank

the cord.

・ To keep the laser pickup clean, do not touch it, and always close the disc tray.
・ Do not attempt to clean the unit with chemical solvents as this might damage the finish. Use a

clean, dry cloth.

・ Keep this manual in a safe place for future reference.

Before Use

Placement of the unit

High-quality hardened tool steel is used for the pin-point feet, securely attached to the bottom of the
player. Although the cover feet may appear loose, the weight of the unit causes them to be firm and
secure, and the design effectively damps and reduces vibration.

・ Be careful to avoid injury when moving the unit, on account of its weight. Get someone to help

you if necessary.

・ To protect floors, etc. you may stick the felt supplied with the unit to the bottom of the cover

feet.

Foot stand

nut

nut

CAUTION

The product shall not be exposed to dripping or splashing and that no object filled with liquids, such as
vases, shall be placed on the product. Do not install this equipment in a confined space such as a
book case or similar unit.

Maintenance

If the surface of the unit gets dirty, wipe with a soft cloth or use diluted neutral cleaning liquid. Be sure to
remove any fluid completely. Do not use thinner, benzine or alcohol as they may damage the surface of
the unit.

Screw

Ring