Just wondering. 
Hi Dave,
Like all things in life there's a plus-minus.
Circuits tend to wear when you turn them on and off because they will expand with the heat when turned on and shrink when they are turned off. Over time this constant heating and cooling can cause small fissures in the circuit board, solderjoints, components etc. That is why incredibly tight quality control is required when boards are manufactured at Bryston because 20 years of heating and cooling can obviously take their toll on the circuitry. Bryston amplifiers are designed to allow for this on/off cycle for 20 years plus so it is not an issue with our gear. So leaving your Bryston on will prevent this constant cycle of expansion and shrinkage but obviously you are using power constantly at the idle current of the particular component. - example- a 4B would idle at about the 170 watt range.
There is also the issue of 'moisture' and 'condensation'. When things heat and cool there will be, depending on the climate, around the components the possibility of small amounts of condensation affecting the circuit boards and components. Again quality design with these real world concerns in mind is an important issue.
A further advantage of leaving things on is that the equipment (in my opinion) sounds better when it is on for about a day. So if I am critically listening I usually turn my gear on before I go to work in the morning so it is nice and toasty by evening. On the weekends I flip my systems on Friday morning and leave it till Monday morning.
So long story short when you design electronics to go 20 plus years the design criteria is much more comprehensive than your typical electronic component. So rest assured that leaving the Bryston on will not cause any problems other than hydro bills- turning them on and off over many years will also not be an issue.
james
