Cartridge Loading and Compliance Laws

So, what you are saying is that most mfg.'s (Lyra, Shelter, Ortofon ect.) use dynamic compliance numbers on their spec sheets but for some reason VDH is using static compliance figures. Correct me if I am wrong here..

Is there a conversion calculator for converting static compliance to dynamic compliance?

Is this formula correct? If so, it would indicate that both are identical measurements only stated in different units.

1 cm / dyne = 1 g ^-1.s^2 = 10^3 kg^-1.s^2

thus 10^-6 cm/ dyne = 10^-3 kg^-1.s^2

1 um = 10^-6m

1 mN= 10^-3 kg.m.s^-2

therefore 1 um / mN = 10^-3 kg^-1.s^2

the two units are thus identical.

From what I gather on the Colibri test measurement sheet their testing is conducted at roughly 100Hz. (Similar to how Lyra tests)

All this together would seem to indicate that the stated VDH 35 Micron/mN compliance is the same as saying 35 x 10-6 cm/dyn only in different terms. If testing was done @ 100Hz. I think...

Its kinda like saying .5" is the same as 1/2" Right?

My math could be flawed though, so if that is the case anyone please feel free to correct these statements above.

There is no formula to convert static compliance to dynamic. In fact dynamic cu can be different laterally than vertically. For resonance estimates vertical is normally used. Most specs are dynamic cu. For example, most Benz carts are 15cu (dynamic). VDH only gives static, but tells you eff mass range of arms for the cartridge.

The only examples of both static and dynamic I could find listed is AT. The 33EV has a static cu of 40. Dynamic is 10 @100Hz. That's equivalent to approx 17, 18 @10Hz. There is no reliable formula to convert 100Hz to 10Hz.
www.lpgear.com/product/AT33EV.html

IMO it's better to find out what makes a good match from other users. Resonance estimates are often wrong and great sounding combos can be outside of the recommended range. If you want to find out exactly what res freq is, get a test record. You're more likely to get bad results with a low cu cart on a light arm. When res is near the audible band it can impact on the music.
Regards,

Not that I disagree because to be honest I am not absolutely certain but maybe someone can check with a mfg. like VDH or Lyra about that conversion. There are others who believe those numbers can be compared with accuracy.

What on earth would make someone like VDH put a number like that for compliance spec if nobady can understand it?

I hear you though, maybe trial and error means everything but not all of us have the luxury of rolling dozens of arms and carts just to find out which ones work well together. Thats why specs are important to me imo so that I can try to put something together which I think might be close to being right combo the first time. Maybe thats why some people get sick and frustrated of analog before they get a taste of what it can really do. just my 2 cents here and thanks for the knowledgeable people (like Fleib) kind enough to provide their input.