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JMW 9 effective mass?

I read on vinyl engine that the effective mass of the JMW 9 is 7.7 grams. If this is true, that would make the JMW 9 a LOW MASS arm. My cartridge is supposed to be used with Moderate to High mass arms. Its compliance is 15. I think I have a mismatch. Why doesn't VPI publish this information so I would not spend $1,500.00 on a cartridge that sounds wrong on my table. I have a Benz H2.

I was told that my arm is in fact a moderate mass arm. Well, where are the specs indicating this? I want to see for myself. If I have a low mass arm, I should be using high compliance cartridges, correct?

Where do I get this information, it did not come with my tonearm, it just had information on installation

What is a good High compliance cartridge?
tzh21y

Showing 1 response by stevencason

stevencason
99 posts
 
This is a late entry to this thread but I thought I would add an entry for clarification.

I recently contacted VPI and asked for the effective mass of the JMW 9 their response was 10.2 grams.

Upon doing further research I found that VPI had increased the effective mass of the JMW 9 by 2.5 grams in 2010.

I am comfortable with using high compliance cartridges on my set up (Scout/JMW 9 purchased in mid 2006).

From my research it seems the conflicting effective mass specifications are correct depending upon when it was manufactured.

An example is the Stereophile review from 2003 by Art Dudley.

https://www.stereophile.com/turntables/776/index.html
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