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At 1 kHz and 100 dB, distortion is very
low.
IMD measurements showed very low
distortion using a combination of 1 kHz
and 1.5 kHz, or 5 kHz and 6 kHz.
With a 10 kHz sine wave input,
distortion again, is very low.
The frequency response is quite flat.
The dips and peaks are somewhat
larger than what I get with some smaller
speakers because I have to put the
microphone farther away (I use a
distance equal to the distance between
the outer edge of the upper driver and
the outer edge of the lower driver, which
in this case, includes the passive
radiator). See how the response
fluctuates around the - 20 dB line. This
is flat!
5
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