The Palladian-A step beyond

Halcro
Wouldn't the amplitude (movement) of the cantilever be the same for both families of cartridge?
Maybe the observed differences have another explanation?

cheers 

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

Sampsa 55
The tail wagging the dog.... 
Agree: That is where I was heading with the effective mass compatibility question.

Ideally the amplitude should be the same regardless of cartridge family. 
If it isn't, there is likely a miss match with eff mass or there is miss tracking due to any number of reasons

cheers 

Because if the movement of the cantilever (at the stylus end) is not the same, then the stylus is not following the groove or the cartridge body is moving in anti phase  Both very bad things indeed. 

Yeah, you can go into groove wall deflection due to higher forces with a low compliance cart and other esoteric reasons, but "ideally" the movement will be the same in a properly set up system.  

Raul
yes, yes of course. I was not and Halcro was not talking about individual carts arms
We were talking about different families of carts, MM and MC

Further, I did not use the word "Exactly"

cheers 
 

Flieb.  Yes I was talking about movement at the stylus end and I'm pretty sure that this is what Halcro meant as well. 
There is the very real risk of us all talking past each other here. 
To rephrase my original question to Halcro. Why would a MM cart have any difference in stylus movement than a MC? This assuming both are set up correctly in a compatible tone arm. There was no hidden meaning in my question. What happens at the other end of the stick is, of course, a whole different story. 

I could not agree with you more on your comments re resonant frequency.

cheers. 

Halcro

Low compliance carts are stiffer, so it takes more effort to deflect  the suspension when playing a record.
More energy in that has to be controlled by the arm.
 

Cheers 

Halcro
It's late, a long day and I have an early flight to your country. I assume that it is hot?

Compliance  measured in um/mN
I think I have the units right? Please excuse me if I haven't.

Anyway.... 
So for a given force we have a measured deflection.
It takes more force (effort) to move a low compliance cartridge a given distance.

So when playing a record, a low compliance cart will need a higher force applied to the stylus to make it move. We want the cart body to stay still while this is happening so it must absorb this energy. Which in turn means the arm has to deal with this as well.

When playing a record, a high compliance doesn't necessarily mean more movement at the motor end of the stylus. The opposite is also not necessarily true. 
It depends upon the geometry of the suspension and where the mag or coils are.
This with all the usual caveats of compatible arm, etc

cheers