Accuphase A-80 Class-A Stereo Power Amplifier

The Accuphase A-80 is a Class A power amplifier developed as a stereo amplifier version of our 50th anniversary A-300 model. Optimizing the 10-parallel push-pull power MOS-FETs in the output stage produces an output power of 65 W into 8 ohms, 130 W into 4 ohms, 260 W into 2 ohms, and 520 W into 1 ohm. Rigorous investment into new, cutting-edge noise reduction technologies has achieved a sense of presence and minute expression that rival live performances. The Accuphase A-80 power amplifier perfectly fuses modern technology with the wealth of knowledge Accuphase has amassed in its pursuit of perfect sonic expression.

Features

Class A driven 10 parallel push pull MOS-FET output stage

Instrumentation amplifier

Current feedback amplification topology

Balanced remote sensing

MCS+ circuitry

Meter display switching

Digital power meter display switching

Hold time switching function that changes the meter peak display time

LINE / BALANCED input switching

4-step gain control

Polarity switching of balanced input connectors

Bi-amping connection and bridged connection switching

Signal input section with a fully discrete configuration for low noise

Speaker output protection circuit guards against short circuiting

Large speaker terminals connected directly to protection circuitry

Edgewise coils improve damping factor

Highly reliable MOS-FET switches with no mechanical connections

Large, high efficiency toroidal transformer

High capacity 120,000 μF filtering capacitors

Aluminium hairline finish top plate

Highly responsive large scale bar graph meters and digital power meters

High carbon cast iron insulator feet with superior damping characteristics

Power amplification section on circuit boards using glass cloth fluorocarbon resin

Specifications

Power output: 65 W into 8 ohms, 130 W into 4 ohms, 260 W into 2 ohms and 520 W into 1 ohm large linear output power

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.03%

Damping factor: 1000

Gain: 28 dB

Input sensitivity: 0.91V

Signal to noise ratio: 123dB

Speaker load impedance: 2Ω to 16Ω

Dimensions: 465 x 240 x 515mm

Weight: 44.6kg