How can I find the manufacture date on my R50s?

[shmengie]

I think the title says it all. But...

I bought some used R50s, and was just curious about when they were manufactured. I looked around the main site and here, but don't see any resources.

Any advice?

Thanks!

[goofyGAguy]

You could always pull the drivers out of the cabinet. That might give you a ballpark date.