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Yamaha

Yamaha A-S2100

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Advanced original amplifier circuitry and elimination of signal loss—resulting in a truly
emotional and dynamic sound. This is a high-grade integrated amplifier that has inherited the new sound of Yamaha in the pursuit of rich musicality.

Color
Black / Gloss Black
Silver / Gloss Black

Overview

  • Floating and Balanced Power Amplifier with MOSFETs
  • All-stage fully discrete construction, balanced transmission and low impedance design
  • Superior quality electronic volume control for optimum sound
  • Large capacity power supply unit delivers energetic, dynamic sound with fast response
  • Symmetrical design in pursuit of ideal stereo reproduction
  • Discretely configured phono amp
  • Headphone amp with fully discrete configuration
  • Level meters visually reflect the dynamics in the music
  • Elegant design with luxurious real wood panels
  • Original speaker terminals combine ease of use and beauty with high sound quality

Floating and Balanced Power Amplifier with MOSFETs

The basic design of the power amp circuit adopts Yamaha’s own, uniquely developed Floating and Balanced Power Amplifier technology. Adopting output elements with the same polarity on the plus and minus sides of the output stage, and also completely separating the NFB (Negative Feedback) circuit and power supply into total of four plus and minus sides of the left and right channels, results in thoroughly symmetric push-pull operation of the output stage, Completely floating the entire power amp circuit from the ground removes any negative impact of minute voltage fluctuations or ground noise. Moreover, the output elements are comprised of MOSFETs, which provide a warm and natural sonic character. The use of MOSFETs, which have the same polarity on the plus and minus sides, further evolves the ideal of a complete symmetrical design, to eliminate sound quality variations due to difference in polarity—a major distinguishing characteristic of the Floating and Balanced Power Amplifier—resulting in sound with a superior signal-to-noise ratio and superbly well-defined sound field.

Specs

  • Maximum Power (4 ohms, 1kHz, 0.7% THD, for Europe) 160 W + 160 W
  • High Dynamic Power/Channel (8/6/4/2 ohms) 105/135/190/220 W
  • Damping Factor 250
  • Frequency Response 5 Hz-100 kHz (+0 dB/-3 dB)
  • RIAA Equalization Deviation 20 Hz-20 kHz +/-0.5 dB
  • Total Harmonic Distortion (CD to Sp Out, 20 Hz-20 kHz) 0.025%
  • Signal-to-Noise Ratio (CD) 103 dB (S: 200 mV)
  • Input Sensitivity (CD) 200mV/47k ohms
  • Dimensions (W x H x D) 435 x 157 x 463 mm; 17-1/8” x 6-1/8” x 18-1/4”
  • Weight 23.4 kg; 51.6 lbs.

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