Anyone's tried repairing/upgrading original Vandersteen 1 speakers?

Carefully space your fingers evenly around the dustcap of the good woofer, push in gently and feel what the travel feels like, it should move easily and you should not feel any rubs.  Now go to the suspect woofer and do the same. If it feels any differently or won't move at all, you have a bad woofer.  If this is not clear, pull the bad woofer, either measure it for impedance or put a battery on it and see of the cone travels with the battery and you should hear the voltage popping sound when you touch wires to the terminals from the battery. If all of that checks good,  put a signal on the raw woofer.  

These most likely had foam surrounds. Could be as simple as new surrounds. I have 2CE and 3As. Son has 2CE Sigs. I really like the sound of all three. Very musical. 

Putting a lot of time and money into entry level speakers might not be the best way to go. If it is cheap enough AND you can find replacement drivers (I would think chances might be good) I might take a chance on it. 

If you have to buy it, for those speakers, I would not take a chance.

The original Vandersteen 1 speakers sold for $600.00 a pair.  Unless you are getting them for under $50.00, I wouldn't waste the money.  I would call Vandersteen and see if parts are still available.  You will need to give them tthe serial# so they can determine the version.