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Power amplifiers stereo — Audio Research D-80
Description, images, technical data and specifications
Audio Research D-80
Image source - (c) Audio Research
The Audio Research D-80 is a stereo power amp from the American maker of tube-based high-end electronics. Its design features a very high input impedance and a wide rated bandwidth.
Key specs that matter
Rated output is 70 W per channel into 8 ohms, and gain is 25.5 dB. Input sensitivity is 1400 mV. The balanced input impedance is 300,000 ohms, which places a much lighter load on the source than a conventional amplifier input does. Rated bandwidth extends from 0.7 Hz to 94,000 Hz. Maximum power consumption is 420 W. The chassis measures 483 x 260 x 470 mm and weighs 28.2 kg, so it is a large and heavy unit.
Pairing
With such a high input impedance, the D-80 can be driven by virtually any preamplifier without loading concerns. Speaker sensitivity matters more, given the moderate 70 W rating.
Alternatives
The S-100 is a further two-channel power amplifier in the Audio Research catalogue.
Key specs that matter
Rated output is 70 W per channel into 8 ohms, and gain is 25.5 dB. Input sensitivity is 1400 mV. The balanced input impedance is 300,000 ohms, which places a much lighter load on the source than a conventional amplifier input does. Rated bandwidth extends from 0.7 Hz to 94,000 Hz. Maximum power consumption is 420 W. The chassis measures 483 x 260 x 470 mm and weighs 28.2 kg, so it is a large and heavy unit.
Pairing
With such a high input impedance, the D-80 can be driven by virtually any preamplifier without loading concerns. Speaker sensitivity matters more, given the moderate 70 W rating.
Alternatives
The S-100 is a further two-channel power amplifier in the Audio Research catalogue.
Specifications
Model name
D-80
Input sensitivity (mV)
1400
Input impedance (balanced) (Ω)
300 000
Input impedance (single-ended) (Ω)
N/A
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
70
Output power (4Ω) (W)
N/A
Gain (dBu)
25.5
Frequency response low +/- 3dB (Hz)
0.7
Frequency response high +/- 3dB (Hz)
94 000
Signal to Noise Ratio (dB)
N/A
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
N/A
Max power consumption (W)
420
Damping factor
N/A
Dimensions (mm)
483 x 260 x 470
Weight (kg)
28.2
Official link
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