Paradigm...

Sure. Each updated model is designated with a new Version number. That way you can tell the vintage.

Kal

What line are you looking at? The current/latest versions of each line are as follows-
Monitor V.5
Studio/Reference V.4
Signature V.2

How do the versions relate to year of production?

What changes were made with the version changes?

Thanks

do your own google search my friend! unless someone has been a long time Paradigm dealer or owned each individual speaker as it has been updated, it is unlikely that anyone would know he differences between versions without doing a google search themselves.