But, still using these "Good Hifi" rings 😮

I'm a good customer of Good Hifi, bought many rings....

I know the rings are a tiny bit to small but I can manage! Any other suppliers in Holland who has the exact size?

No, I haven't found one which supplies the correct rings either.

I only know which firm can restore them with correct ones. But they won't give the details...

I think it was GTS who found the correct  rings with all the correct diameters in the US. Prizely, but it fits.

Apart from the tiny (Glue) part, the angle of the inner ring, which lays on the conus, hasn't the right angle and gives the conus a kind of pre-tension. So the sound of the conus is affected and thus the overall performance is affected by that.  

I will continue to search for the right rings....

Thanks Beobuddy for your explanation, makes lot of sense!

Btw, I reclothed my Penta 3.

What type of clothing did You use ?

Pag

What glue are you using?

I bought rubber rings from Good HiFi and found them a little to small but manageable. Second time I bought foam rings from Audiofriends (all for Penta midrange). They where more accurate in size and easier to work with. Of course the foam ring had to be changed again around 2030 🙂