Stereo Linestage Preamplifier
Audio expression, symphonic beauty, artistic passion, the concert hall’s spatial feel, the excitement of the
audience. Esoteric’s Master Sound Works is an audio product concept that recreates all of the music
information in original master recordings with the most state - of- the -art technology available today.
C-02X
Analog Audio Inputs
Connectors RCA x 3 pairs (RCA 2 can be used as an AV pre-input ) / XLR × 2 pairs
Input Impedance LINE :10k Ω
Input Sensitivity 510mV (at rated output) / 200mV (at 800mV output)
Maximum Input Level 12V
Analog Audio Outputs
Connectors RCA × 2 pairs / XLR × 2 pairs
Output Impedance 47Ω (RCA ) / 100Ω (XLR )
Total Harmonic Distortion 0.0006% (RCA ) / 0.0004% (XLR )
Frequency Response 1Hz − 200kHz ( -3dB) / 3 Hz − 50kHz (-0.2dB )
Signal-to-Noise Ratio (S/N) 116dB ( 2V input, A-weighted)
Gain +12dB
Rated Output 2V
Maximum Output Level 7.5V ( RCA output, 1kHz, 0.003%) / 15V ( XLR output, 1kHz, 0.003%)
General
Power Supply 230V AC, 50Hz / 120V AC, 60Hz / 220V AC, 60Hz
Power Consumption 21W
External Dimensions ( W×H×D) 445 × 162 × 457mm
(including protrusions ) (17 5 /8 × 6 1/2 × 18")
Weight 32kg (70 5/8 lb )
Included Accessories
Power cord × 1 / Remote control (RC -1315) × 1 / Batteries for remote control ( AAA) × 2
Felt pads × 4 / Ownerˇs manual × 1 / Warranty card × 1
S-02 SpecificationsC-02X Specifications
Rated Power Output 145W + 145W (8Ω)
290W + 290W (4Ω)
Maximum Power Output 580W + 580W (2Ω)
Frequency Response 5Hz − 100kHz (+0dB, -3dB, 8Ω)
Signal-to-Noise Ratio (S/N) 115dB (IHF-A)
Total Harmonic Distortion 0.003% (1kHz, 8Ω, 145W)
Gain 29dB
Damping Factor 1000
Analog Audio Input Jacks RCA ×1 pair / XLR ×1 pair
Input Impedance 22kΩ (RCA) / 44kΩ (XLR)
General
Power Supply 230V AC, 50Hz / 120V AC, 60Hz / 220V AC, 60Hz
Power Consumption 440W (no signal: 160W)
External Dimensions (W ×H×D) 445 × 221.5 × 489.6mm
(Including protrusions) (17 5/8 × 8 3/4 × 19 3/8")
Weight 48kg (105 7/8 lb)
Included Accessories
Power cord × 1 / Felt pads × 4 / Power cord support bracket × 1
Power cord support bracket screw × 2 / Owner’s manual × 1 / Warranty card × 1
- These products are made available in three different power supply variations, as 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.
- Specifications and appearance are subject to change without notice.
- Weight and dimensions are approximate.
Stereo Power Amplifier
S
-02X
Auxiliary Phono Modules
MM/MC-compliant phono module boards are also available.
Independent L & R boards designed in dual mono configuration.
Can be configured for remote control operation.
High-quality 4-layer board design with optimized power rectification.
Main Specifications
●Gain: MM: 52dB, MC: 72dB ● Input Sensitivity: MM: 5mV, MC: 0.5mV ●S/N
Ratio: MM: 91dB, MC: 76dB ●Input Impedance: MM: 47kΩ, MC: 20/100/300Ω,
selectable ●RCA3: Distance between L & R input terminals: 22.5cm
* Installation only available at authorized Esoteric service centers. Please direct enquiries to your nearest Esoteric dealer.
Owing to the specialized requirements of the installation procedure, phono module boards cannot be sold separately.
Following installation, the RCA3 jacks located on the rear panel of the C-02X will be converted to phono-only input
terminals, and line inputs limited to 2 pairs of RCA jacks and 2 pairs of XLR jacks.
Upgrade Service
An upgrade service is available to owners of the C-02 Stereo Linestage Preamplifier which allows
the new X edition functions and related parts to be retrofitted to the earlier model.
Applicable Model: C-02
Contents: Addition of EDLC (super capacitor) array and exchange of power supply boards for sound
quality upgrade to equivalent of C-02X.
PROUDLY MADE IN TOKYO
Please note that Esoteric products are only available from approved distributors in overseas territories.
“ESOTERIC”and “VRDS” are trademarks of TEAC Corporation, registered in the U.S. and other countries.
“Grandioso” is a trademark of TEAC Corporation.
©2015 TEAC Corporation. All Rights Reserved. All text, images, graphics and other materials in this catalog are subject to copyright and other intellectual
property rights of TEAC Corporation. These materials may not be directly or indirectly published, reproduced, modified or distributed in any medium.
“Super Audio CD” and “DSD” are registered trademarks.
ESOTERIC COMPANY
1-47 Ochiai, Tama-shi, Tokyo 206-8530, Japan
Fax: (042) 356-9240
www.esoteric.jp
Other company names and product names in this document are the trademarks or registered trademarks of their respective owners.
Design and specifications are subject to change without notice.
PRINTED IN JAPAN 0515O05• TECD -0209
Grandioso Lineage
Representing the next generation in a proud lineage of audio excellence, the
C-02X Stereo Linestage Preamplier and S-02 Stereo Power Amplier feature
state-of-the-art circuitry in a discrete dual mono conguration that dramatically
conveys all the power and energy of music.
Assembled one at a time in Esoteric’s Tokyo factory and incorporating all the knowledge
and technology of the agship Grandioso line, these two new models accentuate the
rened qualities of audio reproduction with expert craftsmanship and
handmade precision.
PROUDLY MADE IN TOKYO
Stereo Power Amplier
S-02
Stereo Linestage Preamplier
C-02X
Stereo Linestage Preamplier
C-02X
The preamplifier is a crucial component that determines the ‘sound’ of an audio system,
and represents the passion and commitment of its makers. As the crowning achievement
of the Esoteric Sound, the Grandioso C1 opened new horizons for ‘Made in Japan’
preamplifiers. Now, this expressive power gives birth to the next-generation C-02X; a
stereo preamplifier created to transcend the concept of high fidelity and resonate with the
refined sensibilities of engineers and musicians alike.
Independent Dual Mono Design
The C-02X’s DC power supply
features a fully independent dual
mono design that completely eliminates inter-channel interference.
Its dedicated bank of five generously rated power transformers
for each channel also blocks noise
from the power line, enabling a pure, natural amplified sound. Grandioso
technology reveals itself in such detailed refinements as the careful
layout of the power supply circuit boards, which further contribute to the
C-02X’s superb sound quality.
Fully-Balanced Configuration
Provides Excellent S/N Ratio
The preamplifier’s source signal is first received by dedicated buffer
amplifiers integrated with each input, from which the circuit configuration
is balanced at each stage. Through the elimination of common-mode
noise and reductions in circuit impedance, a pure, noise-free signal is
fed to the gain amplifiers via the shortest path possible, for an
exceptionally high signal-to-noise ratio.
ESOTERIC-QVCS
The C-02X’s Esoteric-QVCS* volume control employs four precision
switched resistor ladder networks, which change in unison as the
volume knob is rotated. This arrangement allows the signal paths for the
left and right channels and their positive and negative phases to be kept
totally independent and as short as possible. Consequently the sound
has superb clarity, excellent channel separation and highly accurate
phase characteristics. The elimination of audio board wiring to the
volume control further contributes to a reduced signal path, while
preventing degradation of sound quality and helping to maintain the low
distortion one would expect of a reference model.
* QVCS = Quad Volume Control System
Ultra–Low-Noise Logic Control
Built into the front panel, the logic control section is totally isolated, both
physically and electronically, from the preamplifier module by way of an
optocoupler. To assure low-noise operation, it also shuts completely
down when not in actual operation, thus eliminating all possible
influence on the C-02X’s audio circuitry.
Highly Responsive Low-Noise,
Low-Impedance Power Circuit
Five independent high-capacity power transformers, coupled with
large banks of reservoir capacitors, provide power supply circuits that
have exceptionally low output impedances and very clean and stable
outputs. The low-noise silicon carbide (SiC) Schottky barrier diodes
used in the high-speed rectifier circuit further enhance resolution and
the signal-to-noise ratio for significant improvements in sound quality.
Esoteric-HCLD* Output Buffer Boosts Current Transmission
While EDLC* Power Supply Ensures High Stability
As a line driver, the preamplifier must be able
to fully drive the power amplifiers and faithfully
convey the music signal’s wide dynamic
range. The key to achieving this is a circuit that
provides both high current drive capability
and high speed. The C-02X’s output buffer
circuitry delivers an exceptionally high current
drive coupled with a high slew rate of
2,000V/µs for sharp response. Independent
buffer circuits for each output and symmetri-
cal circuitry for both the hot and cold phases
of the XLR outputs maximize instantaneous
output current capability.
Located closest to the output buffer circuitry, the EDLC* Super Capacitor
array, originally developed for the Grandioso C1, was adapted as a highly
stable power source. Its compact physical size belies the extraordinary
100,000µF (0.1F) capacity it provides each channel, for high levels of
instantaneous output power and strong, steady bass reproduction.
Integrating these two technologies, the C-02X preserves musical dynamics
that would otherwise be lost if smaller current transmission levels were
employed between the pre and power amplifiers, allowing it to reproduce a
breathtaking level of audio reality.
*HCLD = High Current Line Driver *EDLC = Electric Double-Layer Capacitor
High-Precision Ball Bearing Controls
The C-02X’s elegant volume
and input selector knobs are
machined from solid blocks of
aluminum. Like the Grandioso
C1, their control shafts use a
VRDS drive mechanism bearing system for high-precision
rotation, with no mechanical play in their movements. Rotational torque
has also been fine-tuned to provide a luxurious analog control feel in
keeping with this high-end preamplifier.
Other Important Features
Five preset volume curves permit selection of the most comfortable operating
feel.
Individual input gain adjustability helps minimize differences in source volumes.
(Range: ±18dB; 0.5dB steps)
Adjustable left and right channel volume balance control.
(Range: ±6dB; 0.5dB steps)
Selectable phase inversion can be individually set for each source.
RCA2 terminals permit switching between normal line output and AV-through
output for systems operated in both AV surround and pure two-channel modes.
Remote controller features high-quality aluminum finish. Can also be used to
operate any of Esoteric’s superb line of SACD players.
Source component name displays can be programmed using the remote
controller.
Also equipped with dimmer, mute, and auto-display-off functions.
Optimized 3D Chassis Configuration
The C-02X’s optimized chassis design features a 2-layer 5-cell
configuration that houses each circuit block in its own compartment.
This structure shortens the signal path to help minimize inter-circuit
interference. The chassis’ 5mm-thick steel bottom plate and thick
aluminum exterior panels are supported at 4 points by Esoteric’s own
patented ‘Pinpoint Feet’ (patent No: JP4075477), which enhance
chassis rigidity while effectively suppressing resonant vibration.
C-02X Block Diagram (1Channel)
Input Circuit Board Output Circuit Board
Input Amplifier Input Selector Output Selector
XLR1
XLR2
RCA1
RCA2
RCA3
HOT
Phase Inverter
COLD
HOT
COLD
HOT
Relay Relay
COLD
HOT
COLD
HOT
COLD
HOT
COLD
HOT
COLD
Direct
Circuit
Coupler
HOT
COLD
Volume Control Amplifier
COLD
Output Amplifier
HOT
Output Amplifier
HOT
COLD
Differential
Amplifier
XLR1
XLR2
RCA1
RCA2
Top Bottom
PROUDLY MADE IN TOKYO
Stereo Power Amplier
S-02
Proudly taking its place as a new reference boasting Grandioso lineage, the S-02 utilizes
the know-how and technology employed in Esoteric’s premier monoblock M1 and stereo
S1 power amplifiers to offer generous power and exceptional dynamics that propel musical
crescendos to breathtaking heights. The S-02’s outstanding performance and unsurpassed
clarity allow the listener not only to hear the music, but also to feel the music, by helping
to reproduce the emotion that is the essence of an involving musical experience.
The Sound of Life Unleashed —
High Power Creates Spaciousness and Dynamism
The indescribable feeling of spaciousness that comes when sound is
truly unleashed and the sense that the music you’re hearing is truly live,
can only be generated by amplifiers that offer abundant power to
properly drive the loudspeakers. Esoteric’s amplifiers use the finest
components and massive power supplies to achieve the high output
power this demands. Faithfully incorporating the design philosophy of
our Monoblock M1 amplifier, the new S-02 sets free every nuance of
sound, and imparts to music all the vibrancy and richness of life.
Exceptional Power Linearity for Outstanding Dynamics
Loudspeaker impedance can vary widely depending on the
frequencies being reproduced. The fast attack of deep bass imposes
demanding loads on an amplifier, requiring not only continuous high
power output, but also repeated bursts of peak power. Unless the
amplifier’s power supply is capable of consistently meeting these
demands, musical dynamics will be compromised. The S-02’s
generous power supply capacity enables this nominally rated 145W
into 8 ohms amplifier to deliver an impressive 580W into 2 ohms — a
testament to the linearity of a power supply that faithfully reproduces
the full spectrum of sound dynamics at all volume levels.
Large-Capacity Custom Power Transformer —
The Heart of the Finest Power Amplifiers
A robust power supply is critical to an
amplifier’s ability to deliver high power in
a linear manner. This is especially true for
the power transformer, so great attention was paid to the material selection,
core size and even mounting of the
S-02’s custom-made EI-type power
transformer. Popular among avid audiophiles, this transformer was selected for the full-bodied, high-quality
bass it provides. To preserve sound purity, this large-core 940VA
transformer features separate windings for left and right channels, and
is securely mounted on a rigid, 5mm-thick steel base plate. Three
parallel 4,700μF capacitors per channel shorten charge and discharge
times, and provide a tighter, faster sound. Power supply wiring uses
heavy-duty cables fitted with crimp terminals, which are tightly bolted
together to reduce impedance to the lowest levels possible.
Breathtaking Speaker-Driving Power
Ensures Accurate Damping for Large Woofers
Optimizing the S-02’s loudspeaker drive capability required reducing
the output impedance to an absolute minimum. To achieve this, a total
of nine bus bars were used for each channel, while the output coil was
eliminated. Strenuous efforts were also made to simplify the circuit
design and widen its range, resulting in an exceptional damping factor
of 1,000, considered a guideline for woofer drive capability. Even
large-diameter woofers are provided with accurate damping for
precise sound reproduction, giving an expansive feel across a wide
range that reaches to even the lowest frequencies.
Balanced Input Stage Configuration
Enables High-Clarity Signal Amplification
The S-02’s audio input signal enters through discrete balanced input
buffer amplifiers and is relayed to the amplification stage by way of a
balanced low-impedance signal path. An outstanding dynamic range is
assured by clean, noise-free signal amplification that provides the fine
sensitivity needed to reproduce nuanced gradations between musical
crescendos and silence.
Large Bipolar LAPT Transistors
Deliver 34 Amperes of Instantaneous Output Current
The S-02’s large bipolar LAPT* transistors are twice the size of more
commonly used power transistors. They also boast an exceptional
continuous current capacity of 17 amps and an instantaneous peak
capacity of 34 amps. In addition, they offer superior high-frequency
characteristics that contribute to accurate reproduction of subtle tonal
qualities.
*LAPT=Linear Amplified Power Transistor
3-Stage Darlington Circuit with 5 Parallel Push-Pull
Configuration
The power amplifier module uses bipolar LAPT transistors in a threestage Darlington configuration with five parallel push-pull sections.
To realize the superior high-frequency characteristics of these devices, a
simplified amplifier circuit was developed to reduce the number of
components and parallel elements.
LIDSC (Low Impedance Drive Stage Coupling) Provides
Loudspeaker Drive Capability Approaching That of the M1
The S-02’s unique LIDSC circuit reduces the drive section’s second
stage to final stage output impedance, while enhancing current supply
capability. This makes it possible to maximize amplitude within the
available power supply voltage while reducing distortion, and so give
this compact Stereo Power Amplifier a loudspeaker drive capability
approaching that of the Monoblock M1.
Independently Powered Voltage Amplifier Stage
For Dramatically Improved Resolution
To prevent large fluctuations in the drive (current amplification) stage
from affecting overall sound quality, the preceding voltage amplification
stage receives a low level signal from the input stage, and derives its
power from a dedicated power supply equipped with its own toroidal
power transformer. This isolation ensures a stable supply of power to
the voltage amplification stage for greatly enhanced resolution of fine
instrument details, even when reproducing full orchestral crescendos.
S-02 Block Diagram
(1 Channel)
Hot
Cold
Voltage Amp Current Amp
NFB
1st / 2nd Drive Stage
LIDSC
Drive Stage Current
Control Circuit
LIDSC
+ Power Supply (V amp)
Voltage Amp Bias Circuit
− Power Supply ( Vamp)
Minimized Negative Feedback (NFB)
For a More Energetic and Natural Sound
Simplifying the amplifier circuitry and reducing the previous stage’s gain
results in greatly reduced Negative Feedback (NFB) for a more natural
and life-like sound.
High-Quality Components Selected For
Outstanding Characteristics and Sensitivity
The S-02 employs highly reliable XLR and RCA input connectors, and
loudspeaker terminals produced by WBT of Germany. Other high-grade
components include low-impedance electrolytic capacitors and transistors featuring superior high-frequency characteristics.
High-Precision Chassis Construction
Optimizes Vibration Suppression
Maintaining Esoteric’s traditional dual-level configuration, the S-02’s
chassis features a 2mm-thick sheet steel internal framework that
segregates circuit blocks into specialized compartments for the shortest
signal path possible. This compartmentalized internal construction is built
on a rigid 5mm-thick steel base and enclosed by thick aluminum panels.
Esoteric’s original pinpoint feet provide a four-point support system that
further ensures high structural rigidity, while eliminating resonances.
3rd Drive Stage
+ Power Supply (I amp)
− Power Supply (I amp)
Speaker
Output
PROUDLY MADE IN TOKYO
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