On Sun, 13 Jul 2003 20:22:12 +0100, Des
wrote:

Reviewers often comment that it takes about 100 hours before a new amp
settles down and start to sound like it 'should'.

More evidence, in case we didn't need it, that "Reviewers" don't know
a lot about engineering ... amplifiers are pieces of consumer
electronics: you don't "run in" a new fridge, or microwave, or
television, or ...

In this case, what constitutes 'burning-in'?

Its definable precisely as the time it takes you to get used to how
your new amp sounds compared to your old one. If an amp *really*
starts to sound different* after its been used for X hours, this is
almost certainly a case of very poor design engineering :-)

Julian

* i.e., for a given input, the output at time t is measurably
different from that at time 0.

--
Julian Fowler
julian (at) bellevue-barn (dot) org (dot) uk