"Keith G" wrote in message
...

"Chris Morriss" wrote


The only things in my experience that change their sound in the first
few
days of operation are loudspeakers. (And then not by much).


It may come as a surprise to a few here, but the minute you start to use
*anything* in this world it's 'physical characteristics' start to change
and
it starts to wear out....

If we observe a speaker and measure its performance then, in doing so,
aren't we altering its behaviour ;o)