It's worth every penny for this product. 20-20220 is, of course, a publicity stunt, no, of course, they will reproduce both 10 Hz and 30,000 Hz, only with a power of 10 dB, no more, but who will hear it? Thus, 63 to 16000 is accurate, with a non-uniform frequency response of + -3-5 dB and zero non-linear distortion; this is more than adequate if you lack absolute pitch.
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