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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
jjss49's avatar
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jjss49
6,612 posts
 
@vegasears 

have not heard of cool down concept for amps

not sure it matters, but pretty sure it doesn't hurt
smrex13
645 posts
 
I've definitely noticed that SS sounds better when left on all the time.  I only have a class a/b integrated and phono stage that I leave on, so it's not using much power when not in use.  Recently, I went out of town for a few days, so I powered everything down.  When I returned, I was looking forward to hearing my rig.  Those first few albums were pretty painful - everything sounded thin and glassy.  The next night, things were sounding great again.  I really wasn't expecting such a difference, but it wasn't subtle.  That being said, if I had a class A amp, I wouldn't leave it due to environmental concerns.  
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daledeee1
572 posts
 
The Pass XA25 uses 240 watts at on/standby.  I can't see $20-35 a month in extra power usage.  I usually turn it on ahead of time and it does sound better after warm up.  Some components need to get to 50C to sound right.
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