Pass Labs Class A Amp Warmup Question

[Puma Cat]

Hey gang,
I know many folks here love and enjoy Pass Lab amps.

Some of you may remember I built up two Nelson Pass-designed Amp Camp amps last summer.

I've set these up again over the long Memorial Day holiday weekend to get some real hours on them and on my (also DIY) GR-Research X-LS Encore speakers (which I recently found out need 400 hours of running in), and have an anecdotal observation that they seem to require about an hour of warm-up time to fully come "on song". When I listen to them as soon as I switch them on, they seem to be a bit thin and 2-dimensional sounding. Once they've been on for an hour so, though, they really do sound very good, especially when run as a pair of bridged monos.

Here they are set up on the floor in a quickie set-up configuration (sorry for the quality of the quickie iPhone 12 "snapshot")



Is this observation consistent with your experiences? What do you guys that have a Pass Class A amp typically do? Do you leave the amp on all the time, or fire it up for listening sessions?

Lastly, I'm not telling you guys anything you don't know, but Nelson Pass is a genius.