The Palladian-A step beyond

Wouldn't the amplitude (movement) of the cantilever be the same for both families of cartridge?

I see what you're saying Richard.....
Of course the movement of the cantilever is governed by the groove modulation and not by the compliance.....
Silly me 🤓
I can't understand then, why the arms I've ditched. failed the high-compliance MM test......👐❓

Regards

Wouldn’t the amplitude (movement) of the cantilever be the same for both families of cartridge?

Not necessarily. In both cases, the stylus follows the groove, but there could be differences in the extent to which groove modulations move the cantilever relative to the tonearm and the tonearm relative to its pivot. A stiffer cantilever suspension could well mean less cantilever movement and more tonearm vibration.

Halcro
maybe the reason is down to incompatable effective mass of the arm cart combo?

A stiffer cantilever suspension could well mean less cantilever movement and more tonearm vibration.

That's what I think most folk believe, thus putting more stress in the tonearm......
I'm still not totally convinced 🤔
Surely attaching an accelerometer to a tonearm to produce graphic evidence of the stresses would not be difficult?
I'm sure Continuum did....

maybe the reason is down to incompatable effective mass of the arm cart combo?

The FR-66s has the highest effective mass of any commercial tonearm produced.
If there were no audible compatibility issues with it, plus its little brother FR-64s plus the DV-507/II plus the SAEC WE-8000/ST.....I can't see effective mass being the reason....?
At any rate, it was not a low-frequency problem or arm vibration that ruled out the other tonearms.