Moving coil VS moving magnet/iron

SoundSmith is in the business of selling MI cartridges. So concocting a "theory" about cartridge physics is an attempt to gain an advertising edge to entice the unwary! At least Joe Grado never went for this sort of thing - and he was building and selling MI cartridges long before SoundSmith.

Naturally a mat that is "dead" and well-damped is a wise choice! I am presently using the Hiraoka Diskmat SE-22 (thick rubber with embedded metal weights) on one TT. And a 3mm magnesium 12" disc (very dead!) on another TT.

You can say that Decca also never "advertised" like that, but it’s MI and when i read comments about Decca i see how many MCs went to the dust.

Every manufacturer is free to record a video for youtube or make comments on audiogon like J.Carr did in the past.

It’s great that we can watch Peter’s lecture. Yes, his business is MI, but MC is also his business, you’re sending your broken MC to him.

If every manufacturer can share the knowledge with us it would be better, now we have Peter, who’s next?

P.S. Joseph Grado passed away long time ago.

Here is a documentary about Grado

Thank you roberjerman, exactly. One thing though. Joe Grado (a watch maker) invented the moving coil cartridge. For some reason I have not been able to ascertain he switched to moving iron. Obviously he thought it better for some reason. I wish I could say more about Soundsmith cartridges but I have just never been tempted to buy one although I find the cactus cantilever intriguing.  

Chakster, Ledermann's lectures are just a marketing tool. There is truth in them but also unfortunately distortions designed to favor his products. In Peter's case I actually think he believes himself. This is what happens when you let assumptions lead you around by the nose. Having an hypothesis is fine but to make it fact you have to prove it. Peter handily neglects that aspect. On the other hand nobody has proven him wrong.
Roberjerman, I forgot to add that although you are right, the damper in MC cartridges prevents the reflection of some energy energy is still reflected at the grove in the for of inertia. The force required to move the effective mass of the stylus and cantilever. This force is effectively absorbed by the vinyl as long as the stylus is tracking correctly.