Accuphase A-75

Overview

Inheriting many of the outstanding technology features of the A-250, the A-75 represents a full model change from the A-70,

ready to take its place as our ultimate pure class A stereo power amplifier. While reflecting this tradition, the A-75 also

implements latest technology such as the ultra low-noise instrumentation amplifier principle realized in a discrete configuration,

along with optimized signal input and power amplification stages, resulting in an astonishing 128 dB S/N ratio (at -12 dB gain),

surpassing even the formidable earlier Accuphase stereo amplifier lineup.
The output stage of the A-75 features power MOS-FETs renowned for their excellent frequency response, sonic performance,

and superior reliability. In the output circuitry, ultra-heavy-gauge edgewise coils with a surface area more than three times

larger than conventional units, combined with MOS-FET switches are used in place of relays, to eliminate mechanical contacts

and improve long-term reliability. Top-grade materials, sophisticated circuit pattern technology, and various other measures

result in low impedance and enable the realization of a damping factor of 1000, which represents a twenty five percent

improvement over the A-70.

Features

• Pure Class A stereo power amplifier with outstanding S/N ratio and very high damping factor
• Rated for 60 watts into 8 ohms and 480 watts into 1 ohm
• Power MOS-FETs in 10-parallel push-pull configuration
• Instrumentation amplifier principle
• All signal paths realized with discrete semiconductor components
• Balanced Remote Sensing principle
• MCS+ circuit topology
• Current feedback amplification principle
• Digital power value readout and bar graph voltage indication
• Support for bi-amping and bridged mode

Specifications

• Power output: 60 watts per channel into 8Ω (stereo), 240W into 8Ω (mono)
• Frequency response: 20Hz to 20kHz
• Total harmonic distortion: 0.03%
• Damping factor: 1000
• Gain: 28 dB
• Input sensitivity: 0.87V
• Signal to noise ratio: 128dB
• Speaker load impedance: 2Ω to 16Ω
• Dimensions: 465 x 238 x 515mm
• Weight: 43.9kg
• Year: 2018