Zyx mistracking issue

Hey, just like any ZYX cartridges the compliance of your cartridge was measured at 100Hz, so your calculation with vinylengine is all the way wrong if you are not converted 100Hz to 10Hz before. I was in this quest too, lol

When i asked Mehran at SoraSound (official distributor) to confirm the 10Hz compliance with Nakatsuka-San, the answer was very strange, they could not tell me anything about 10Hz compliance to make my measurements correct. They said it’s dangerous to measure compliance at 10Hz, so they use 100Hz in Japan.

All Japanese cartridge manufacturer measure Dynamic Compliance @ 100 Hz (not at 10Hz like in our world).

As you can see on official site your model has 15×10-6cm/dyne (horizontal dynamic compliance at 100Hz) and 12x10-6cm/dyne for vertical.

What does that mean?
In our world you have to convert it to 10Hz (just multiply on 1.7)
The result will surprise you, but this is more or less correct:

**horizontal dynamic compliance: 25.5cu @10 Hz
**vertical: 20.4 cu @10 Hz

ZYX dynamic compliance is medium-high, it is probably the reason why the weight of them is light.

This is all you need to know before you will calculate resonance frequency.

I owned two ZYX cartridges before and even official distributor could not answer the simple question about "real" dynamic compliance.

I also experienced distortion in one channel on my ZYX Airy3, but only in burn-in period, and ONLY with Grey Market sample i bought from 2juki on ebay. My second sample was higher model Premium 4D SB and it was from SoraSound (USA), i can’t recall any problem with it.

Do you have grey market sample from 2juki ?

However, according to the specs, Trackablity ＞ 60μm. Using the HiFiNews test LP, +12db (~45 μm) tracks OK, but +14db begins to mistrack slightly, which seems coherent with the specs, and suggests that Zyx are not so great trackers.
If so, I might look elsewhere for a replacement: Zyx prices have doubled since I bought mine and I would prefer a better tracker.

Interesting, because mine (both models) passed all tracks on Hi-Fi Test LP, the arm was Technics EPA-100 with stock shell and then with ZYX LIVE-18 headshell. I don't use ZYX anymore and i think you will find a much better cartridge, because your own ZYX is not even a top model. My advice is to look for something else when it comes to replacement.  

Grace F9 is much better with genuine US-14 stylus, this is next generation of styli for F14 (fully compatible with F9). 

The goal of US-14 is MicroLine (ML) stylus tip. 
Sometimes it's hrad to understand what type of stylus Grace used, but when ML stamped on the box it's for MicroLine. Here is mine. 

ZYX is very expensive cartridge and useless whet the stylus is worn, waste of money. I do not regret I stopped using them (Airy III and Premium 4D). 

Life is much easier with MM cartridges.