Ortofon tonearms ,Static and Dynamic - Difference?

I read that another thing to consider is how to get the counter weight as close to the arm pivot point as possible. I don't know the technical reason for this, but if all else is equal, the closer the weight to the pivot, the better the arm will sound. Perhaps an engineer can explain the reasons which I think have to do with how quickly the arm reacts to vertical movement.

I had a Shindo Labs turntable with a dynamic arm based on an early Ortofon tonearm. I think its outstanding performance was partially attributable to the dynamic arm. Once I tried it as a balanced arm. It was nowhere nearly equal to dynamic tracking.

I would just add to my comments about the 309D, that I made in 08. I am still happy with the arm, but found it was a poor match to higher mass cartridges. It really was'nt haapy with one of the stone Koetsu cartridges, much better with a Benz Micro LP. My fault for not checking compliance first