Esoteric A-100 Brochure

New Product Information

Stereo Tube Power Amplifier

/ Integrated Amplifier

Model A-100

Cutting Edge Tube Technology from ESOTERIC

ESOTERIC is proud to introduce a stereo tube power
amplifier incorporating exceptionally high quality and “cutting
edge,” tube technology.

The A-100 provides 45W / ch output power from KT-88’s in
UL-Push / Pull operation driven with a direct coupled
cathode follower. The cathode follower and voltage
amplification stage is directly coupled to form a triple stage
by combining a unique and active bias circuit.

The A-100 is truly an innovation leading conventional tube
technologies to the “Next level!”

- Directly-coupled triple stages

The DC voltage control circuit ensures stable operation
of the directly-coupled triple stages (voltage
amplification stage, cathode follower stage, and output
stage), achieving a truly involving acoustic expression
from the A-100.

-

Unique active bias circuit
The A-100 features a unique and advanced active bias
circuit. This circuit compensates the bias voltage
supplied to the output stage, detecting the cathode
current and the driving level. High linearity and superior
performance of the output stage is achieved by optimal
bias voltage control from this new design.

-

Custom output transformer
The A-100 features a newly
designed custom output
transformer achieving highly
delicate and precise musicality.
The amplifier uses specially
treated dual layer foil (copper
and silver), as the 2
coil. This design provides very
tight coupling properties
between the 1

st

order coil.

nd

order

- Stabilized power supplies

All stages except the KT-88 stage are powered by fully stabilized
power supplies. The A-100 reproduces an exceptionally deep
and finely detailed sound stage thanks to this innovative power
supply design.

-

DC powered tube heater

All tubes except the KT-88 are DC heated. Hum noise is greatly
reduced by this heater design.

-

Mechanical chassis construction

Power supply and output transformer are held by an extremely
rigid ‘H’ structure and circuit components reside in a block
configuration surrounding this mainframe design. The massive
chassis construction keeps the unit from unwanted vibration and
induced noise between circuit components.

- Input selector / volume attenuator

The A-100 is designed for pure power amplification but it also
works as an integrated amplifier by selection from an operating
switch on the rear panel. This switch activates an input selector
(RCA x3 / XLR x1), and also a very high quality volume
attenuator.

- Two bias modes

The A-100 has two bias modes (A or B), selectable from a back
panel switch. B mode is for a normal setting, and A mode (slightly
reduced bias voltage), is for slightly finer sound depending on
other component within the system.

- Remote controller

A remote control with illuminated keys for integrated amplifier
operation is included.

- High grade parts selection

RCA input terminals are highly reliable
WBT-0201. The speaker terminals are
WBT-0710Cu, the latest version of
WBT terminals, incorporating pure
copper conductor material for high
signal purity and ultra-low terminal
resistance. Signal loss is kept to a
minimum with the use of these high
grade audiophile connections.

Output power 45 W + 45 W (1KHz, 4 Ω / 8 Ω)
Frequency

response
S/N ratio > 98 dB (JEITA)

Input sensitivity 400 mV / 45 W

Input impedance 10 KΩ

Input terminal RCA x 3, XLR x1

Output impedance 4 Ω / 8 Ω

Tubes KT88 x4 / 12AU7 x4 / 12AT7 x2

Power supply

Power
consumption
External
dimensions
(W × H × D mm)

Weight 40 kg (88 Lbs.)

20～60 kHz (＋1 dB、-3 dB)
(1W, 4 / 8 Ω)

AC 230 V, 50 Hz (European model)
AC 120 V, 60 Hz (U.S.A. / Canada model)
AC 220 V, 60 Hz (Korea model)

200 W

382 mm × 253 mm × 434 mm
(15 x 10 x 17 inches)

- Design and specifications are subject to change without notice - Weight and dimensions are approximate.

47 Ochiai 1-chome, Tama-shi,

TEAC ESOTERIC COMPANY

Tokyo 206-8530, Japan

Fax: [phone] www.teac.co.jp/av/

www.teac.com/esoteric/