I have not heard those specific cart's however I do have a Koetsu jade on JWM 10 on a TNT.
The JWM is not an ideal arm for the Koetsu's as they are low compliance cartridges. That being said the jade sounds pretty darm good on the JWM 10. Ultimatly, I do plan to go to an arm with a higher effective mass.
The dynavector's compliance are at the low end of medium compliance and are a better match for the JWM arms and certainly would be the "safe" choice.
The 10.5i is better match for the koetsu's then the 10 due to it's heavier side weights and increased rigidity.
Ultimatly, the decision should be made based on which cartridge you think sounds best not some mathematical model.
If you decide for the koetsu I would rec. adding the 3gm headshell weight that VPI sells to increase the effective mass of the arm and use no or very little damping oil.(I use none)
Good luck.
The JWM is not an ideal arm for the Koetsu's as they are low compliance cartridges. That being said the jade sounds pretty darm good on the JWM 10. Ultimatly, I do plan to go to an arm with a higher effective mass.
The dynavector's compliance are at the low end of medium compliance and are a better match for the JWM arms and certainly would be the "safe" choice.
The 10.5i is better match for the koetsu's then the 10 due to it's heavier side weights and increased rigidity.
Ultimatly, the decision should be made based on which cartridge you think sounds best not some mathematical model.
If you decide for the koetsu I would rec. adding the 3gm headshell weight that VPI sells to increase the effective mass of the arm and use no or very little damping oil.(I use none)
Good luck.