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| | Stereophile: Plinius SA-Reference power amplifier |
 | | Fig.1 Plinius SA-Reference, balanced frequency response at 2.83V into (from top to bottom at 2kHz): simulated loudspeaker load, 8, 4, 2 ohms (0.5dB/vertical div., right channel dashed). |
 | | Only when it came to high-frequency intermodulation did the Plinius falter very slightly, the 1kHz difference component lying at 66dB (0.05%) with the amplifier in class-AB mode driving an equal mix of 19kHz and 20kHz tones into 4 ohms just below visible waveform clipping on the oscilloscope (fig.8). |
 | | Fig.8 Plinius SA-Reference, class-AB operation, HF intermodulation spectrum, DC24kHz, 19+20kHz at 330W peak into 4 ohms (linear frequency scale). |
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