There is no REAL solution to warm up time other than having the unit turned on. David's suggestion of a timer may have some validity, but you better make sure that it is a unit rated for high current draw. Something designed for an air conditioner might work pretty good. As to whether or not it would generate more noise into the electrical circuit is debatable. Myself, i see nothing wrong with leaving the amps tuned on all the time. As a technician, i will flatly tell you that turn on surges do way more harm than leaving the unit on AS LONG as the unit is well ventilated. This means it must have at least 8 - 12" of clearance above it and nothing on the sides of it. I have several power amps that idle between 130* - 150* measured directly at the top of the heatsink. Since heat rises, this is a pretty good indication of how hot the unit is running. These amps stay on all the time WITHOUT air conditioning turned on in the house. The only time that i've had a problem with an amp was after turning it off for a period of time and then turning it on. The in-rush current level was so high as the power supply tried to fill the capacitor bank that it caused the bridge rectifier to partially fail. For the record, this amp was designed by Nelson Pass. This is not to bad-rap him or his designs. On the contrary, i love them. Two of the several amps that never get turned off are models that Nelson built and designed. Sean >