Integrated Amplifier Yamaha A-S2200 Black/Pianoblack

Integrated amplifier with fully balanced circuit design and mechanical grounding of the chassis

The Yamaha A-S2200 is an integrated stereo amplifier built around a fully balanced circuit design from the input all the way to the speaker terminals, adopting several solutions from the higher-end A-S3200 model. The signal path is routed differentially, which suppresses common-mode noise — reflected in a signal-to-noise ratio of 114 dB via the balanced input and 110 dB via the line inputs. The feature set also includes an MM/MC phono preamplifier with an RIAA equalisation deviation of ±0.5 dB, so the unit can handle an analogue source without an external phono stage.

Power is supplied by a toroidal transformer rated at 625 VA, which feeds an output stage with a rated power of 90 W + 90 W into 8 ohms (0.07 % THD, 20 Hz–20 kHz) and 150 W + 150 W into 4 ohms. Dynamic power rises from 105 W into 8 ohms up to 220 W into 2 ohms, which — together with a damping factor above 250 — means firm control over more demanding loudspeakers. The internal wiring to the speaker terminals consists of PC-Triple C conductor with a diameter of 2.7 mm, complemented by thick ground wires as part of the low-impedance concept.

The construction is based on the Mechanical Ground Concept — the large power transformer, the block capacitors and the heatsink are bolted directly to the chassis, and the feet are anchored with welded screws. The result is maximum rigidity and suppression of unwanted vibration, which shows up as articulate and rhythmically precise bass. This rigidity is further supported by brass feet with a silver finish and speaker terminals machined from solid brass, allowing firm hand-tightening. The low-impedance ground routing contributes to a wide, open soundstage with precise localisation of instruments.

The audio path uses PP film capacitors designed for audio applications. The front panel carries a pair of illuminated analogue level meters that visualise the dynamics of the signal. The frequency response extends from 5 Hz to 100 kHz (+0 / −3 dB), the unit weighs 22.7 kg and measures 435 × 157 × 463 mm. By registering the product, the warranty can be extended to 5 years (2+3).

Key features

• Balanced path: Fully balanced design from input to output
• Power supply: 625 VA toroidal transformer
• Output power: 90 W + 90 W into 8 ohms, damping factor above 250
• Construction: Mechanical Ground Concept and brass feet
• Analogue: Built-in MM/MC phono preamplifier