Spendor SP100 mid/bass rubber surround

How will not have factory spec drivers impact the potential resale value of the Spendors?

I own or have owned three different versions of the S100 series, all purchased used, and I'm not sure I would even buy a Spendor at a steep discount if it didn't have factory drivers?

Not that different from what I can see. I use to be a Spendor dealer but not currently one. I am a dealer for other products brought in by the current importer so I see price lists and technical info. The best bet would be to get them direct from England; you might check on the Spendor forum on Yahoo to see if anyone on there could help you or contact a Spendor dealer in England.

Did you call the guys at Q S and D audio. They were the US Importers for Spendor for years. That mau have some advice for you.

http://www.qsandd.com/

I don't believe that you ould find any buyer who would knowingly purchase a Spendor speaker without original, or factory replacement drivers. The sound of the speaker is largely due to the drivers used.
If your friend sold you S100 speakers with a foam surround mid driver, then I would say it is not original. If he, or someone else managed to cobble it together with a foam surround, it will not sound the same.

I regrettably agree that the drivers must be original. I would be sorely tempted to return the whole mess to the guy that sold them to you. If they were a gift that is obviously a whole different story. If you really want Spendor after knowing about the service issues I would buy another all original pair. In fact I never even considered buying "modded" speakers. The enginerring is so precise and carefully planned I just don't believe this is a place for amatueres.
I replaced the tweeters on my JM Lab Focal speakers with exact drivers, that wre there originally and were provided by the North American importer. I wouldn't have done it any other way