Esoteric A-80 Brochure

New Product Information

Monaural Power Amplifier

Model

The new ESOTERIC A-80 monaural power amplifier provides
exceptionally high speaker driving ability applying rich power
supply in a compact size dimension. Cutting edge circuit design,
highly sophisticated architecture of components and precise
machining technology – incorporating these finest elements, the
A-80 delivers the ultimate musical expression to true musical
enthusiasts.

The high quality power supply

The A-80 features highly-rated (approx. 1k VA) large toroidal
transformer for main power supply, and R-core sub transformer is
added for further stability. The ultra stable and rapid power
supplying capability of A-80 is further enhanced by two large
capacitors (33,000 μF / 76 mmφ x 100 mm) used for the power
stage.

State-of-the-art component architecture

One of the most unique features of the A-80 is its state-of-the-art
component architecture.
The core components of the A-80 are assembled on the massive
9mm steel inner chassis, which is precisely machined from steel
block. The power supply components are suspended from the
bottom of the chassis to achieve the low center-of-gravity structure.
The amplification stage is attached on the top surface of the
chassis to isolate itself from potential vibration and magnetic flux
leakage from power supply components.
This extremely massive core chassis assembly is supported by
three stainless poles equipped with ESOTERIC’s proprietary
quenched steel pinpoint feet system. Total weight of this pole
mounted feet system amount to 2.7 kg, and directly supports the
core assembly with ultimate rigidity. Bottom surface of the pinpoint
feet cup is an arch-shape to allow minimum area “cup fringe”
contact to the floor.

A-80

The sandwiched structure of output stage transistors

The output stage power transistors are sandwiched with a large
heat sink and 10 mm aluminum blocks.
This sandwich construction effectively absorbs vibration and
promotes heat radiation of the power transistors. This construction
also works as a magnetic shield absorbing magnetic flux leakage
from the power transistors, resulting in clearer sound reproduction.

Unique vibration-free heat sink structure (PAT.P)

The A-80 has a specially made large heat sink provided with two
stainless poles for fin resonance absorption. The base part of the
heat sink has 10 mm thickness for optimal heat radiation property.
The output stage transistors are supported rigidly with the
aluminum block and the heat sink, to get the maximum effect of
heat radiation.

Massive body construction which eliminates the unwanted
vibration

The exterior is covered with specially selected aluminum material.
This is the same material used for industrial semi-conductor
processing machines, and the quality level is strictly controlled and
the processing distortion level is minimized. T 20 mm aluminum is
applied for the front panel, and T10 mm aluminum for the top, side,
and rear panels. To keep the highest level physical precision, all
the component parts are built under strict torque control.

The highest grade parts selection

The highest grade audiophile components were selected for the
A-80. Extensive listening tests were conducted for parts selection
based on component neutrality and variations in “acoustic texture.”
High quality Hovland capacitors, Vishey-Dale wire-wound resistors
are used for the main circuit and high purity 6N (99.9999%), copper
are used for critical internal wiring.
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

KEY FEATURES

- 1kVA High Capacity Toroidal Power Transformer

- 9mm Thick Steel Heavy-weight Main Chassis

- 2-stage Darlington Circuit on Amplification Stage

- 3-parallel Push-pull Circuit on Output Stage

- Large Size Heat Sink

- 3 Pin-point Feet

- Machined Panels (Front : 20mm thick, Back : 10mm thick)

- Torque Controlled Bolts

MAIN SPECIFICATIONS

Output power 200 Watts (8 ohms), 400 Watts (4 ohms)
Frequency response 10Hz to 100kHz (+0dB/-3dB, 8 ohms)
S/N ratio > 110 dB
Input sensitivity 850 mV / 160 Watts (8 ohms)
Input impedance 200k ohms (RCA)
Input terminals Balanced x 1 (XLR), Unbalanced x 2 (RCA)
Speaker terminals x 2 pairs (Binding post type)
GND terminal Screw type

Power supply

Power Consumption 200 Watts
External Dimensions (W x H x D) 250 x 219 x 430 mm (9-7/8" x 8-5/8" x 17")
Weight 34 kg (75 lbs.)

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

- 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/