Accuphase A-80 Stereo power amplifier

The A-80 is the successor to the A-75, launched in 2018, and incorporates the technology of the flagship A-300 Class-A mono power amplifier to exceed the sound quality and electrical performance of the A-75.

Although the A-80 is class A, it can output linear power in all impedances and can drive any speaker perfectly.

The near-zero noise performance, combined with the attractive timbre of Class-A, creates a new expression of music.

It also offers complete protection against abnormal conditions, satisfying the high demands of audiophiles and music fans over the long term.

Now with 65 watts of pure class A per channel and weighing in at 44.6kg.

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Description

Accuphase A-80

The 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 A-80 power amplifier perfectly fuses modern technology with the wealth of knowledge Accuphase has amassed in its pursuit of perfect sonic expression.

The A-80 has an intense power supply, a massive special-made high-efficiency toroidal transformer, and two sizeable 120000μF special-made filtering capacitors in the unit’s center.

The filtering capacitors have the largest capacity of any Accuphase product.

The A-80 improves the Class-A operation area by 8% over the A-75 as 65W into 8Ω load.

The former model A-75 has excellent noise performance; however, the A-80 achieves even 7% lower guaranteed output noise voltage than the former model.

Accuphase A-80 specifications:

  • 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
  • Class A driven 10-parallel push-pull MOS-FET output stage
  • Instrumentation amplifier
  • Signal input section with a fully discrete configuration for low noise
  • Current feedback amplification topology
  • Balanced remote sensing
  • MCS+ circuitry
  • High damping factor of 1,000
  • Large, high-efficiency toroidal transformer
  • High capacity 120,000 μF filtering capacitors
  • Power amplification section on circuit boards using glass cloth fluorocarbon resin
  • Hold time switching function that changes the meter peak display time
  • 4-step gain control
  • Bi-amping connection and bridged connection switching
  • Large speaker terminals connected directly to protection circuitry
  • Speaker output protection circuit guards against short-circuiting
  • Highly reliable MOS-FET switches with no mechanical
  • Aluminum hairline finish top plate
  • High-carbon cast iron insulator feet with superior damping characteristics

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