Amplifier warm up


I was plalying Boz Scaggs, "Silk Degrees" LP.  After side one, I ate dinner.  One hour later I played side 2.  The second side sounded clearer, more vibrant with better sound stage. I have a Parasound P6 preamp and Parasound Halo A21+ amp.  Is it possible that an hour of warm up improved performance?
aeschwartz
In my case it would be easier to explain that my ears or my mood had warmed up.
Yes, that's exactly what happened. These are solid state components. SS takes much longer than tubes to warm up and sound their best. In fact they really should be left on 24/7 if you want them to sound their best. But hey, don't take my word for it. Simply leave them on the next few days and see, er hear, for yourself.
Gear warms up, sure, = and you were more relaxed after dinner. Any chance you had a drink with it?
If you played side one from a cold start, it would be surprising if the hour of warm up didn't improve the sound.  MC nailed it.....leave your SS amp turned on. 
yes ss gear sounds better when warmed up, running a while

i am not sure leaving a power amp on 24-7 is a good idea... stuff does degrade over time with heat... if you are listening every day maybe ok, but if not using for a while, maybe still better to turn off

little more green too... if you care about that