Welcome freesey,

Search some of the recent posts (in the technical questions section - I think) about this topic. There are some posts by Ian and/or Alan that will give you some insight to this often misunderstood concept. My personal belief is that there really is no such requirement - but it really doesn't hurt to give the speakers an hour or two of use at medium volumes prior to any "critical" listening.

Now about those 60s vs. the 80s........

Randyman