Kleos Sibilance

Good for Tzh21y!

I am the OP and no amount of adjusting has solved my issue. As I mentioned, putting weight on the headshell improved things significantly.

Over last weekend I removed about 1 gram of the Blu-tack (imitation brand) and reset VTF/VTA. This resulted in more lively sound and somewhat underdamped sound. And the sibilance increased somewhat.

Yesterday I removed the Kleos and send it to Sota so they can install it in a SME 309 for my upcoming Star refurb. I put the wand with the Shelter 501 II back on the JMW 9 Signature and readjusted VTF, etc. Real difference. Not as fast, lighter and undistinguished bass, and generally lower quality sound. The Shelter is pretty good in some areas, it does retrieve a fair amount of detail and has a clarity that my VPI/Dynavector 20xH cannot match. Of course I bought the Shelter when they were under 1K$.

Y'all have some fun,
Robert

Let us know how the Sota works out. I am very interested in the outcome.

When I purchased a new cart for my Signature arm, I used the following to determine if the cart could be compatable. I purchased the mentioned cart.

ZYX Fuji R100 X(H)-SB
- Cart weight 9 (5 cart, 4 SB)
- Compliance 15 horizontal, 12 vertical

JMW-9 Tonearm
- Effective mass 7.7

JMW-9 Signature Tonearm
- Effective mass 9.5

RESONATE FREQUENCY EQUATION

rf = 159 / sqrt ((eff. mass + cart weight + fastener weight) * (compliance))

CALCULATIONS

JMW-9 Tonearm
- Resonant freq 9.9 horizontal, 11.1 vertical

JMW-9 Signature Tonearm
- Resonant freq 9.4 horizontal, 10.5 vertical

I would also check your spindle to pivot distance to ensure it is 223mm. With the VPI plinth, I can almost make this distance (just over 222mm). I also use the Mint LP Protractor as I find this more accurate than the supplied protractor.

I am not sure why any of this is not clearly documented, but having this has helped my situation. Maybe HW can comment on the above specification.

So, Maczurak, tell us how the resonant frequency relates to tracking sibilance. I'm rusty on the specifics.

Thanks,
Robert

This was a post more in response to text from 01-11-11: Robob. I also checked the Kleos as this is what I was planning on trying once I completed my project to replace my Scout plinth. I wouldn't buy any cartridge without first checking this calculation.

"Isn’t easier to send us an e-mail and ask us what works perfectly in the arm we make!!!!!"

That is one way to do it. The other is to buy the cartridge you want and if it does not work ask for help. If it cannot be made to work then one must go back to the previous cart, buy something else, or replace the arm. In this case I really wanted a Delos or a Kleos.