Hi,

I have a pair of 4331A's with woofers that need refoaming.

I pulled the drivers out and found that thet don't match - one is a 2220B and the other is a 2231A???

I know that they are supposed to have 2231A's in them, but what the hell is a 2220B? It's not listed at the JBLpro website.

The other mysterious thing is the cones have written on them (on the back) 2231A with a wax pencil.

Any help would be appreciated!

Cheers

Chris