The amp will do any warmup while you listen. Perhaps things will sound better after some warmup. I just listen right away. I'm not going to sit and twittle my thumbs while the amp might warmup.

You'll either perceive a difference or you won't.  It certaily isn't going to affect the amp either way. 

It usually takes from 3 to 10 minutes for the biasing to stabilize, at idle.

The bias will change more, however, as the amplifier is used and gets a bit hotter.

I would wait 5 minutes before using an amplifier for best the sonic results. There is not much pint in waiting longer.

hcsunshine wrote:

i realize you can play through a solid state amp immediately upon power up. i was just wondering is there any advantage at all to warm up a solid state amp and if so what is the optimal time maybe a half hour or an hour? i usually wait as long as i can, most times 15-30 mins is all i can wait, before pushing play on the cd player for my emotiva UPA 1's.