New Devialet 400

[PhilP]

Some believe in burn in personally I don't and there should be no technical reason why this is the case. 

I admit that its difficult to find published technical analysis to support the notion of burn in periods for audio equipment though there are post from thousands of 'audiophiles' who believe that they have experienced it

However, several Devialet owners including me have noticed that the temperature at which the amps run is quite high and variable when fresh out of the box but then settles down to a lower level after a period of a few weeks or so.  It seems likely that something is going on akin to a burning-in period and this has measurable (non-subjective) side-effects. 

I think Devialet themselves refer to a 75hr burn in period. Similarly, Naim who's kit I owned previously and who I don't particularly think of as purveyors of snake-oil say in their manuals "Naim equipment takes a considerable time to run in before it performs at its best. The duration varies, but under some conditions the sound may continue to improve for over a month'. Presumably this is something both manufacturers have noted and believe themselves otherwise why would they say it?