[UnsteadyKen]

As an electrical ignoramus, i have long been puzzled by a throw away
comment often seen in loudspeaker reviews along the lines of...
"the copper plated pole piece acts as a shorted turn", the implication
being that this is a good thing.

Can anyone explain in simple terms why copper plating would have this
effect?
And if it is such a good thing, why don't they just short one of the turns
deliberately?

__
Ken