Solid state preamp warm up time?

I used to leave my preamp on 24/7 unless it was tubed. My amp I left it on for the weekend if I knew I would be listening. I will say I think an amp or preamp needs 24 hrs to warm up and sound its best.

I think the first 30 minutes makes the most difference. Less for Class-As.

A local retailer told me this AFTER he has sold me a Solid State preamp - "about twice the time needed for a tube amp, try 4 hours". Bugger.

I have owned solid state and hybrid preamps that take 3 days to sound their best. I would leave the preamp on 24/7 and turn off the amp.

i leave all my SS gear on 24/7 unless i know i wont be listening for a few days