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Power amplifiers stereo — Audio Research S-100
Description, images, technical data and specifications
Audio Research S-100
Image source — © Audio Research
The S-100 is a stereo power amplifier from Audio Research, built with comprehensive dual-connectivity input impedance and a clean power-doubling relationship. The S-100 brings Audio Research's considered engineering to two-channel power amplification.
Key specs that matter
Input impedance is a high 100k ohms on both balanced and single-ended connections. Output power is 100W into 8 ohms, doubling cleanly to 200W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. Maximum power consumption is 475W. At 483 x 171 x 432mm and 19kg, the S-100 maintains a manageable stereo amplifier chassis.
Sound and use context
Expect clean, dependable amplification reflecting the clean power doubling into 4 ohms, suggesting genuine authority across a wide range of loudspeaker impedances, consistent with Audio Research's broader considered American engineering standards.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker impedances, and Audio Research's own Reference 6SE Line-Stage preamplifier shares the brand's coherent engineering philosophy.
Alternatives
Audio Research's own flagship Reference 330M offers a considerably more powerful monoblock alternative for buyers wanting Audio Research's most accomplished current engineering.
Key specs that matter
Input impedance is a high 100k ohms on both balanced and single-ended connections. Output power is 100W into 8 ohms, doubling cleanly to 200W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Frequency response spans 20Hz to 20,000Hz within plus-or-minus 3dB. Maximum power consumption is 475W. At 483 x 171 x 432mm and 19kg, the S-100 maintains a manageable stereo amplifier chassis.
Sound and use context
Expect clean, dependable amplification reflecting the clean power doubling into 4 ohms, suggesting genuine authority across a wide range of loudspeaker impedances, consistent with Audio Research's broader considered American engineering standards.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker impedances, and Audio Research's own Reference 6SE Line-Stage preamplifier shares the brand's coherent engineering philosophy.
Alternatives
Audio Research's own flagship Reference 330M offers a considerably more powerful monoblock alternative for buyers wanting Audio Research's most accomplished current engineering.
Specifications
Model name
S-100
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
100 000
Input impedance (single-ended) (Ω)
100 000
Output impedance (balanced) (Ω)
N/A
Output impedance (single-ended) (Ω)
N/A
Max current (A)
N/A
Output power (8Ω) (W)
100
Output power (4Ω) (W)
200
Gain (dBu)
N/A
Frequency response low +/- 3dB (Hz)
20
Frequency response high +/- 3dB (Hz)
20 000
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)
475
Damping factor
N/A
Dimensions (mm)
483 × 171 × 432
Weight (kg)
19
Official link
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