Вот эти - далеко не "технокосмос"
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Идиотский, мягко говоря, setup. Это кому-то же пришло в голову "скрещивать" "Alexia" - довольно сложную, в плане нагрузки, АС, с "McIntosh"-евским УМ, с его транзисторно-автотрансформаторным выходом
P.S.
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This speaker will play loudly with just a few watts. However, it demands quite a lot of current from the partnering amplifier. The Alexia's electrical impedance and phase angle are shown in fig.1. (This graph was taken with the original, higher-value tweeter resistors.) The impedance magnitude stays between 2 and 6 ohms from 12Hz to 4kHz, with a gentle rise above that frequency. The minimum value is 1.96 ohms at 86Hz, and there is a demanding combination of 3.6 ohms and –43° phase angle at 54Hz.
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http://www.stereophile.com/content/wilson-audio-specialties-alexia-loudspeaker-measurements