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Power amplifiers stereo — Esoteric S-05
Description, images, technical data and specifications
Esoteric S-05
Image source — © Esoteric
The S-05 is a stereo power amplifier from Esoteric, built with substantial output power and an extraordinarily wide bandwidth. The S-05 brings Esoteric's considered engineering to two-channel power amplification.
Key specs that matter
Output power is a substantial 300W into 8 ohms, doubling cleanly to 600W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Gain is 28.5dBu. Frequency response spans an extraordinary 5Hz to 100,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 102dB, with total harmonic distortion plus noise at 0.007% with full global feedback, and maximum power consumption at 245W. At 445 x 191 x 444mm and 30.7kg, the S-05 represents a substantial stereo amplifier commitment.
Sound and use context
Expect substantial power delivery reflecting the clean power doubling into 4 ohms combined with the strong 102dB signal-to-noise figure, consistent with Esoteric's broader uncompromising Japanese engineering standards.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker impedances, and Esoteric's own Grandioso E1 phono stage and N-01XE DAC offer natural, brand-coherent pairings.
Alternatives
Esoteric's broader amplifier catalogue offers alternatives for buyers wanting a different output level.
Key specs that matter
Output power is a substantial 300W into 8 ohms, doubling cleanly to 600W into 4 ohms - a textbook power doubling indicating a robust, well-regulated power supply. Gain is 28.5dBu. Frequency response spans an extraordinary 5Hz to 100,000Hz within plus-or-minus 3dB. Signal-to-noise ratio is 102dB, with total harmonic distortion plus noise at 0.007% with full global feedback, and maximum power consumption at 245W. At 445 x 191 x 444mm and 30.7kg, the S-05 represents a substantial stereo amplifier commitment.
Sound and use context
Expect substantial power delivery reflecting the clean power doubling into 4 ohms combined with the strong 102dB signal-to-noise figure, consistent with Esoteric's broader uncompromising Japanese engineering standards.
Pairing
The clean power doubling into 4 ohms suits a wide range of loudspeaker impedances, and Esoteric's own Grandioso E1 phono stage and N-01XE DAC offer natural, brand-coherent pairings.
Alternatives
Esoteric's broader amplifier catalogue offers alternatives for buyers wanting a different output level.
Specifications
Model name
S-05
Input sensitivity (mV)
N/A
Input impedance (balanced) (Ω)
N/A
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)
300
Output power (4Ω) (W)
600
Gain (dBu)
28.5
Frequency response low +/- 3dB (Hz)
5
Frequency response high +/- 3dB (Hz)
100 000
Signal to Noise Ratio (dB)
102
Total Harmonic Distortion + Noise (0% global feedback) (%)
N/A
Total Harmonic Distortion + Noise (100% global feedback) (%)
0.007
Max power consumption (W)
245
Damping factor
N/A
Dimensions (mm)
445 × 191 × 444
Weight (kg)
30.7
Official link
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