Accuphase A-20V Pure Class-A Stereo Power Amplifier

A pure Class A stereo power amplifier that uses power MOS FETs as output elements. It uses a current feedback amplifier circuit that feeds back the output signal in the form of a current. The power supply section uses a large, highly efficient, high-power transformer of approximately 400VA.

Rated continuous average output

(20Hz to 20kHz) Stereo mode (both channels operating simultaneously)

2Ω: 80W/ch

4Ω: 40W/ch

8Ω: 20W/ch

Monaural mode (bridge connection)

4Ω: 160W

8Ω: 80W

Total harmonic distortion Stereo mode (both channels operating simultaneously)

2Ω: 0.05%

4-16Ω: 0.02%

Monaural mode (bridge connection)

4-16Ω: 0.02%

IM distortion 0.003%

Frequency response Rated continuous average output: 20Hz to 20,000Hz, +0 -0.2dB

1W output: 0.5Hz to 160,000Hz, +0 -3.0dB

Gain 28.0dB (GAIN switch at MAX, both stereo and mono modes)

Load impedance Stereo: 2-16Ω

Monaural: 4-16Ω

Damping factor Stereo: 120

Monaural: 60

Input sensitivity (8Ω load) Stereo: 0.50V (rated continuous average output) 0.11V (1W output)

Monaural: 1.00V (rated continuous average output) 0.11V (1W output)

Input impedance Balanced: 40kΩ

Unbalanced: 20kΩ

S/N (A-weighted) 110dB (input short, rated continuous average output)

Power meter level Logarithmic compression type, with display off function

NORMAL: -40dB to +3dB

-20dB: -60dB to -17dB

Power supply AC100V, 50Hz/60Hz

Power consumption No input: 160W

Electrical Appliance and Material Control Law: 250W

8Ω rated output: 180W

Accessories

AC cable, instruction manual

External dimensions: Width 475 x Height 170 x Depth 426mm

Weight: 22.6kg