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Category: Power Amplifiers

Accuphase A-48 - Stereo Power Amplifier

Key Features

High-Performance Amplification

  • Stereo power amplifier designed for high-end two-channel audio systems

  • Delivers powerful and stable output suitable for a wide range of speakers

  • High current capability for driving demanding loudspeaker loads with control and authority

  • Exceptional damping factor for tight bass and accurate driver control

Advanced Circuitry

  • Utilizes Accuphase’s refined amplification topology for low distortion and high linearity

  • Precision analog design optimized for natural and musical sound reproduction

  • High signal-to-noise ratio for clear and transparent audio with minimal background noise

Connectivity & Integration

  • Balanced (XLR) inputs for low-noise, high-fidelity signal transfer

  • Unbalanced (RCA) inputs for versatile system compatibility

  • Heavy-duty speaker binding posts for secure and reliable cable connections

Power Supply & Stability

  • Robust power supply with large transformer and high-quality filter components for stable performance

  • Designed to maintain performance even under dynamic and complex musical passages

  • Excellent thermal design for consistent operation

Build Quality & Design

  • Precision-engineered chassis with vibration-resistant construction

  • Premium components and internal layout for long-term reliability

  • Classic high-end audio aesthetic with refined finish

Ideal Use Cases

  • Driving high-performance bookshelf or floor-standing speakers in a dedicated stereo setup

  • Paired with quality preamplifiers or integrated sources for audiophile-grade music playback

  • Suitable for medium to large listening rooms where powerful, detailed sound is desired

Description

Featuring a six-fold parallel push-pull architecture with power MOS-FETs, as well as ideal gain allocation realized with discrete semiconductors in an instrumentation amplifier configuration, the A-48 harnesses a wealth of advanced technology. Its outstanding performance is exemplified by a signal/noise ratio of 117 dB, output of 360 watts into 1 ohm (music signals), and a damping factor of 800. The newly designed output protection circuit can detect any short-circuiting of the speaker terminals, for complete peace of mind. This power amplifier is the ultimate instrument for immersive music appreciation on the highest level. 

 

  • Power MOS-FETs in 6-parallel push-pull configuration
  • Linear output characteristics over entire load impedance range
  • Strong power supply with massive toroidal transformer and large 60,000 μF filtering capacitors
  • Instrumentation amplifier principle
  • High-gain signal input section in discrete configuration
  • Dedicated power supply for signal input section
  • Polarity switching for balanced input connectors
  • MCS+ circuit topologys
  • Current feedback principle in amplification circuitry
  • Protection circuitry using MOS-FET switches
  • High damping factor of 800
  • Speaker output protection circuit guards against short-circuiting
  • Two sets of large speaker terminals
  • 4-step gain control
  • Support for bi-amping and bridged mode
  • Aluminum top plate with hairline finish

 

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