To measure street home you need a test record like this
Found this on Vinyl Engine
Zyx is a Japanese maker and Japanese makers usually specifies their compliance at 100 Hz, so if we say a static compliance of 15 @ 100 Hz, this means a dynamic compliance of roughly 7.5 @ 100 Hz. Now, to convert to 10 Hz we use 7.5 x 2 or x2.2 and get 15 or 15.4. So a static compliance of 15 @ 100 Hz is roughly a dynamic compliance of 15 @ 10 Hz.
Then on the contrary on Audiogon
ZYX dynamic compliance is 15cu (horizontal) and 12cu (vertical), both measured at 100Hz.
To convert it to 10Hz we have to multiply on 1.7 (not on 2.2).
I have original manual on hands from my ex ZYX Premium 4D SB. Static compliance does not even mentioned in the original printed manual for ZYX (because nobody need it).
at 10Hz ZYX compliance is about:
25.5 cu (lateral)
20.4 cu (vertical)
EQ Compliance horizontal - 15×10-6cm/dyne
EQ Compliance vertical - 12×10-6cm/dyne
Recommended tonearm effective mass 12grams minimum/20grams maximum
With the TB or SB headshell added it will be:
+TB - recommended tonearm effective mass 9.5grams minimum/17.5grams maximum
+SB - recommended tonearm effective mass 7grams minimum/16.5grams maximum.
Therefore a tonearm with a medium effective mass is recommended for all of the above.
Hence my confusion.
If the information in Audiogon is correct they would require a very low mass arm not medium as suggested by the Pinkfish quote which was posted by GT Audio the UK distributor.