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    MEASUREMENTS

    Aug 11, 2020 5 minutes
    —John Atkinson

    I tested the Yamaha A-S3200 with my Audio Precision SYS2722 system (see the January 2008 “As We See It”1). I first preconditioned the amplifier by following the CEA’s recommendation of operating it at one-eighth the specified power into 8 ohms for 30 minutes. At the end of that time, the top panel was warm, at 101.4°F (38.6°C). I subsequently performed my usual thermal stress test by running the amplifier at onethird power into 8 ohms for an hour. The Yamaha’s top panel was only a little warmer than before, at 109.8°F (43.3°C). The A-S3200 appears to operate its output devices with a relatively high amount of bias current, but it has sufficient heatsinking capacity for its power.

    Examined first at its single-ended line

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