| http://www.w3.org/ns/prov#value | - Most of the distortion components are out of band (ultrasonic) and the CCIF IMD test with 19 Khz and 20 Khz shows the O2 aced the 1 Khz in-band difference signal (which the desktop amps did much worse on).The ear's sensitivity for audible THD is a U shaped curve he is most sensitive around 500 hz - 1 Khz and dramatically rises at both ends of the spectrum.
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