Dynamic vs. Static compliance

[Irakli]

Hi All 🙂

I was looking at Audio Technica OC9MLII specs at

http://www.lpgear.com/Merchant2/mer...Code=LG&Product_Code=ATC01&Category_Code=XMAS

I found two compliances listed: dynamic and static.
Never seen such a distinction before.
Could anybody recommend which one should I use for tonearm/cartridge resonant frequency calculation?

Regards, Irakli

 

[Panicos K]

Irakli?The Greek?Use the dynamic compliance for your calculations.

 

[Irakli]

Not Greek, Georgian. Thanks for advice.
I want to use AT OC9MLII with Thorens TP-11MKIII tonearm with effective mass7.5 g.
If I use 35x10-6 dyn/cm compliance, the resonant frequency comes to 8Hz. Perfect!

Thanks

 

[Werner]

You need the Dynamic Compliance as measured at 10 Hz, since with most arms you'll end up with a resonance f in this neighbourhood.

Sadly, most manufacturers specify it at 100Hz, including AT. This is a useless spec.

The compliance at 10Hz will be somewhere between the static one and the dynamic one at 100Hz. For the AT it lies probably around 18 cu.