well, any resonance has fundamental frequency where happen that resonance ( it does not matters where it comes. ) and that means that at the same time that is happenuing are created its harmonics exactly as the harmonics in the music and that’s why those " distortions " always affect all the listening frequency spectrum and we have to take in count that those " distortions " happen all over the frequency range not only at 8 hz or 20 hz but at 3 khz too ( for whatever reasons. .And of course we all know that the harmonics of 8Hz (16Hz,24Hz,32Hz,40Hz,48Hz, 56Hz etc) do absolutely no harm to the tonearm in vibration mode whilst the harmonics of 7Hz (14Hz, 21Hz, 28Hz, 35Hz, 42Hz, 49Hz) render the tonearm a weeping sloppy mess..😱
If we needed more proof of Raul’s ignorance of a tonearm’s Resonance Frequency...he has amply provided it.
Oh...and just one other thing.....a Tonearm’s Resonant Frequency has no effect on the SOUND of a particular tonearm/cartridge combination and there are no peer-reviewed scientific papers which have ever claimed this.
It is ’audiophiles’ who take the fact of a physical phenomenon (Resonant Frequency)...to extrapolate unproven and unsubstantiated properties to accompany this phenomenon.