Almarg's post of 12-17 is spot-on:
"The OP might consider asking the manufacturer how much AC current or power the specific model draws at idle...I suspect that the sonic benefit of leaving it on all the time will be minimal."
In fact I was considering the Moon NEO 330 amplifier (250 wpc into 4 ohms) and asked exactly that. It draws 40W in standby, as pointed out in Almarg's post - not a true standby. For me, and given the recent 40% increase in electric costs in Boston, this is too much, economically and ecologically. We light our kitchen with less than 40W using LED's. To their credit Simaudio acknowledes this and says they are working on a true soft-start.
It is easy to look up the temp curves for power bipolar transistors. The effects are very small for normal room temps. So, unless your amp runs hot and with minimal or no feedback or active bias, any effect would be minimal.
Went with ATI - a true standby/soft-start with active bias. The newer thermal track transistors (also used by McIntosh in the MC452 and other models) would also render this question essentially moot.
"The OP might consider asking the manufacturer how much AC current or power the specific model draws at idle...I suspect that the sonic benefit of leaving it on all the time will be minimal."
In fact I was considering the Moon NEO 330 amplifier (250 wpc into 4 ohms) and asked exactly that. It draws 40W in standby, as pointed out in Almarg's post - not a true standby. For me, and given the recent 40% increase in electric costs in Boston, this is too much, economically and ecologically. We light our kitchen with less than 40W using LED's. To their credit Simaudio acknowledes this and says they are working on a true soft-start.
It is easy to look up the temp curves for power bipolar transistors. The effects are very small for normal room temps. So, unless your amp runs hot and with minimal or no feedback or active bias, any effect would be minimal.
Went with ATI - a true standby/soft-start with active bias. The newer thermal track transistors (also used by McIntosh in the MC452 and other models) would also render this question essentially moot.