Интегральные усилители — Yamaha A-S2200

The Yamaha A-S2200 is a stereo integrated amplifier that sits between the A-S1200 and the A-S3200 in Yamaha's upper A-S range. It combines balanced and single-ended line inputs with a phono input covering MM and MC pickups, a toroidal power supply and LED level meters on the front.

Key specs that matter

Rated output is 90 W per channel into 8 ohms and 150 W per channel into 4 ohms, measured from 20 Hz to 20 kHz at 0.07% THD. Maximum power into 4 ohms at 1 kHz and 0.7% THD is 160 W per channel for Europe, and dynamic power per channel reaches 105, 135, 190 and 220 W into 8, 6, 4 and 2 ohms. Frequency response is flat within 3 dB from 5 Hz to 100 kHz and within 0.3 dB across 20 Hz to 20 kHz. Distortion from CD or balanced inputs to the speaker outputs is 0.035% at 50 W into 8 ohms, and the damping factor is at least 250 at 1 kHz into 8 ohms. Signal-to-noise ratio is 110 dB for CD-level inputs and 114 dB for the balanced input. The amplifier measures 435 x 157 x 463 mm and weighs 22.7 kg.

Engineering and use context

The phono section accepts MM cartridges at 3.5 mV into 47 kilohms and MC cartridges at 150 microvolts into 50 ohms, with RIAA deviation held within 0.5 dB. Phono noise figures are 96 dB for MM and 90 dB for MC, and phono distortion to the line output is 0.005% for MM and 0.02% for MC. Line inputs have a sensitivity of 200 mV at 47 kilohms, the balanced input 200 mV at 100 kilohms, and a main input takes 1 V at 47 kilohms. Power comes from a 625 VA toroidal transformer. Under Yamaha's Mechanical Ground Concept, the transformer, block capacitors and heatsink are bolted directly to the chassis, and the feet are fixed by bolts welded to the main chassis. The feet are silver-plated brass. Thick ground wiring follows a low-impedance design, and the internal speaker wiring is 2.7 mm PC-Triple C copper, while the A-S2200 uses PPS film capacitors in the audio circuits.

Pairing

An XLR-equipped player or DAC connects through the balanced socket, and the main input allows a separate preamplifier or processor to drive the power stage directly. Speaker terminals are cut from solid brass and can be tightened by hand. A low-output moving coil cartridge works straight into the built-in MC gain stage.

Alternatives

The Yamaha A-S3200 is the next integrated amplifier up, whose circuit stays balanced from input terminals to speaker outputs, rated at 100 W per channel into 8 ohms.