Should Class A Amps be left on??

Based upon advice here and from other sources. The amp has been on for a solid ten days now. There is no comparision between turning off and leaving on. Clearly Class A amps,whose output operates in Class A definitely sound better being left on. This amp has really come into its own now and is quite impressive to say the least.

You da man. :-)

After reading all the threads posted I agree that leaving the amp on is the way to go sonically. I have a Audible Illusions S-120 and it sounds great when left on. However I would like to turn the tube pre(AE-3 Cary) off to keep the Sylvania's in top shape. My question is how do I turn the pre off while not damaging the amp. Dosen't the amp need to see a load while on? Many thanks.

South43, be REALLY CAREFULL when you turn on the preamp. I know a gentlemen, damage his speakers because he left the power amp on, and turn of the pre the way you do. When you turn on the pre the load will goes through the power amp and out to your speakers. I damage my speakers twice because the power disrupted.

From "Audio Power Amplifier Design Handbook" 2nd ed. by Douglas Self page 362 final paragpraph:

"Readers of hi-fi magazines are frequently advised to leave amplifiers permanently powered for optimal performance. Unless your equipment is afflicted with truly doubtful control over its own internal workings, this is quite unnecessary. (And if it is so afflicted, personally I'd turn it off now) While there should be no real safety risk in leaving a soundly constructed power amplifier powered permanentley, I see no point and some potential risk in leaving unattended equipment powered; in Class-A mode there may of course be an impact on your electricity bill."