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Accuphase A-48 Class A Stereo Power Amplifier

Accuphase A-48 Class A Stereo Power Amplifier

Accuphase A-48


Featuring a six-fold parallel push-pull architecture with power mosfets, as well as ideal gain allocation realised 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.

A-48 Features

  • Pure Class A stereo power amplifier with outstanding S/N ratio and very high damping factor
  • Rated for 45 watts into 8 ohms and 360 watts into 1 ohm
  • 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
  • High-gain signal input section in discrete configuration
  • Instrumentation amplifier principle
  • Dedicated power supply for signal input section
  • All signal paths realised with discrete semiconductor components
  • Balanced Remote Sensing
  • MCS+ circuit topology
  • Current feedback amplification principle
  • Speaker output protection circuit guards against short-circuiting
  • Line and balanced input connectors
  • Highly responsive large peak power meters
  • Two sets of large speaker terminals
  • 4-step gain control
  • Support for bi amplification and bridged mode
  • Aluminium top plate with hairline finish
  • Power output: 45 watts per channel into 8Ω (stereo), 180W into 8Ω (mono)
  • Frequency response: 20Hz to 20kHz
  • Total harmonic distortion: 0.03%
  • Damping factor: 800
  • Gain: 28 dB
  • Input sensitivity: 0.87V
  • Signal to noise ratio: 117dB
  • Speaker load impedance: 2Ω to 16Ω
  • Dimensions: 465 x 211 x 464mm
  • Weight: 33kg Net
  • Year: 2019
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