KEF BD139 re-foam or replace?

[Longaevus]

As far as I am aware there are no oval surround rubber/foam kits available. I am also aware there were different variations of this passive radiator such as the "missing-D" model, the B139.

Should I look for a pair of these? Are they interchangeable, spec wise?

Am I wrong and the surrounds on these are actually reparable?

(sorry if this is not the appropriate section) ​

 

[Longaevus]

Ok I figured this out on myself, surround restoration is currently not possible for these shaped woofers but a B139 with a removed magnet would be a compatible alternative.

 

[CT Jim]

I'm not a KEF person, but are you saying the passive radiator you need is a certain model speaker, maybe the same as the woofer, with the magnet removed? Does the magnet have to be removed for the passive to work correctly?

 

[Yvan_donald]

Hi, you can't use a passive woofer it have no coil, the better or cheapest way it is to buy used, as for the model I don,t thing it have big différence, I know the Rubber is insert and glue,but I dont know if you can pulling out . I have one Rubber surround from an old b 139.