Accuphase A-80 Class A Stereo Power Amplifier

Accuphase A-80 Class A Stereo Amplifier

Overview

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
• Year: 2023