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Old 14th October 2006, 06:00 AM   #1
Irakli is offline Irakli  United States
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Default Dynamic vs. Static compliance

Hi All

I was looking at Audio Technica OC9MLII specs at

http://www.lpgear.com/Merchant2/merc...gory_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
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Old 15th October 2006, 08:57 PM   #2
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Irakli?The Greek?Use the dynamic compliance for your calculations.
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Old 15th October 2006, 09:47 PM   #3
Irakli is offline Irakli  United States
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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
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Old 16th October 2006, 06:37 AM   #4
Werner is offline Werner  Europe
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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.
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