HiFi Subjectivist ¦ Audio Forum ¦ NVA User Group

Hi,

Since moving from sealed speakers to some (amazing) ported Royd Sorcerers I have noticed some occasional cone flap.

I think my cart compliance (high compliance Denon DL-301mk2) / tonearm (low mass SME 3009 series 2 improved fixed headshell with fluid damper) match is ok, at least the numbers suggest so. I'm going through a Phono-1 which I guess doesn't have any subsonic highpass filter...

...perhaps none of this is an issue but just wondering if anybody has played with inline filters, like:

https://www.parts-express.com/harrison- ... a--266-246

I'm going to experiment with more fuild in the damper too, in case that helps.

Anybody have any thoughts?

You might want to try abit less damping, the reason being is that it appears denon measure compliance at 100hz rather than 10. Audio technica do this too. The compliance at 10hz is roughly double the figure, but it is a rough estimate.
So the 301 compliance figure is probably somewhere between 20 and 25 not the 13 you might use. The sme fluid damper is more useful when putting a lower compliance cart in it, it aims to stop the tail wagging the dog when an low med compliance cart is used. Maybe lower the fd200 out of the way and try it with no damping rather than changing the fluid level of viscosity?

The ported cabs exert less control over the driver which may be why you are seeing a bit of cone flap

Thanks Ant!

That's a great idea, and even easier than adding more fluid... I can easily just turn the paddle up out of the trough and try again. Will do that tonight and let you know.