Tube power amp - keep on continually?

DO NOT LEAVE TUBE POWERAMP ON UNATTENDED!
TURN IT OFF WHEN YOU LEAVE LISTENING ROOM.
TURN IT ON AND LEAVE FOR 15...20MIN TO WORM UP BEFORE LISTENING.

Thanks for all the advice. I will turn it off when it is not in-use.

Alan

I agree. Do NOT leave tube power amps fired up unattended. Proper use calls for a warm-up time ( 5 - 15 minutes depending on design ) prior to use and then a "heat-down" time prior to shut-off. Cranking signal from the tubes before they are fully warmed and / or turning them off before they've had a chance to cool off causes extra thermal stress on them, which leads to premature failure. Sean
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Sean can you explain cool down time before shutting the amplifier off? Like how long to wait? Never heard about this before? Would this apply to a class A triode tube amplifier also?

Cool down time, may be that is why everything I turn off the amp, there is a "DIN DIN DIN" sound from the Rogue M-120, I believe is from the output tubes. Thanks Sean