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Type K are too old to have foam surrounds.

Martin

Thanx for your reply, Dillen. So are they rubber then?

Actually, I seem to remember that these are pure cardboard, possibly with the outer (flexible) circumference
covered in a rubbery súbstance, latex or so. That was the way most speaker producers did it back then.

Martin

Dillen wrote:

Actually, I seem to remember that these are pure cardboard, possibly with the outer (flexible) circumference
covered in a rubbery súbstance, latex or so. That was the way most speaker producers did it back then.

Martin

My tip, thin cardboard with candle wax

Thanx for the replies. What do you guys think, will these last as long as rubber, or do I need to replace the surrounds with rubber rings to make sure they do not wear as foam eventually does. I hope you don't mind me asking, but this type of surrounds is new to me, and I am restoring a pair of type K's. I have always dreamed of owning a pair of these vintage beauties, so I want to make sure I am doing the right thing. I also have another question, the two resistors in the crossover seems fryed, any thoughts on which type I need to replace them with? I can't read the statistics on these resistors anymore.......

Thanx in advance for the help.