Esoteric G-25U Specifications

The G25U also includes digital audio up conversion, allowing you to output a digital
audio signal path at selectable levels up to 192 kHz. Re-sampling the digital data stream
(up to 32 times), allows for red book CDs and DVDs to sound better. Ambience, depth of
field, imaging and clarity are all dramatically improved.
Note: This unit up-converts linear PCM signals only. Dolby Digital, DTS or other format
signals cannot be up-converted.
Up-conversion “upgrades,” the investment you have already made in DVDs and CDs.
Your collection may astonish you once you begin to hear what you have been missing!
In addition to user selectable up conversion, the G25U includes proprietary Esoteric
digital filtering. This effectively reduces noise artifacts and allows the digital signal to
actually sound more “analog.”
The G25U has a rigid body construction combined with elegant styling.
2mm thick steel chassis and 15mm aluminum faceplates are used. Three pinpoint
isolation feet support the chassis. These feet maximize the stability of the crystal clock
by allowing the unit to be mechanically isolated from internal and external vibrations that
can affect the accuracy of the clock. The front panel design is highly elegant with a
brushed aluminum finish. The front panel displays all the current settings at all times.
Conclusion:
The G-25U is a hybrid “PCM digital audio up converter” and a 'master clock generator'.
As a D/D converter, it can convert digital audio frequencies from red book CD standards
all the way up to 192 kHz, improving sound quality by over sampling and re-timing a
PCM digital audio data stream. As a master clock generator, it can process word clock
signals by its internal, high precision crystal oscillator. This master clock is accurate to
+/- 1ppm. (Measured as 1 part per million. Most conventional CD/DVD devices are
accurate to +/- 10-50 ppm).
MAIN SPECIFICATIONS
Output Frequency Accuracy: ±1ppm (Factory default)
Digital Input and Output Terminals for PCM Audio up Conversion or digital re-
clocking/re-timing:
Output Terminals: x4 (XLR1, XLR2, RCA, OPTICAL)
XLR1 and XLR2 can be used in dual mode.
Output Signals: S/PDIF, AES3 DUAL
Input Terminals: x3 (RCA1, RCA2, OPTICAL)
Input Signals: S/PDIF
WORD CLOCK terminals
Output Terminals: x3 (BNC: A/B/C)
Output Signals: TTL level/75Ω
External Synchronization Input Terminal: x1 (BNC)
Input Signal: 1.4 5Vp-p/75Ω (44.1/48/88.2/96/176.4/192kHz/10MHz)
AC Power: 100V/120V/230V AC, 50-60Hz
Power Consumption: 9W
Dimensions (W x H x D): 442mm x 96mm x 359mm (17.5” x 3 .77” x 14.1”)

Esoteric G-25U Specifications

General Specifications

power supply (Europe model)	AC 230 V, 50 Hz
power supply (U.S.A./Canada model)	AC 120 V, 60 Hz
power consumption	9 W
weight	7.9 kg
external dimensions	440 x 95.5 x 342 mm

Word Synchronization

output format (44.1kHz series)	44.1kHz, 88.2kHz, 176.4kHz
output format (48kHz series)	48kHz, 96kHz, 192kHz
output	BNC x 3 /TTL rectangular wave /75Ω
accuracy	±1 ppm
input frequency range	44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz, 10MHz (±10ppm)
input signal level	1.4～5Vp-p sine wave / rectangular wave
external input jack	BNC x 1 /75Ω

Digital Inputs and Outputs

digital inputs (RCA)	x 2
digital inputs (TOS)	x 1
input format	S/PDIF format
sampling frequencies	32, 44.1, 48, 88.2, 96, 176.4, 192 kHz
digital outputs (XLR)	x 2 (2 single or 1 AES3 DUAL)
digital outputs (RCA)	x 1
digital outputs (TOS)	x 1
output format	S/PDIF format, AES3 DUAL format