How do I break in a tube amplifier?


I should be taking delivery of my Yaqin MC-30L tube amplifier this weekend. I believe the dealer is going to set it up and bias it and may even let it run for a few hours before I pick it up. It's going to be a 2nd system sharing speakers with my primary home theater system so I will have few opportunities to leave it running for extended periods of time.

Does it do any good to just leave the amplifier turned on or does it actually need to by playing music?
mceljo
Yogiboy - The primary reason is that I only have a 1,200 sq-ft house and the WAF alone would prevent me from having multiple sets of speakers in the same room. Plus, giving up my good speakers for blu-ray would be a very poor choice because both my wife and I really enjoy the HD audio quality. My wife has only commented on a single CD being a bad recording, but definately notices when a movie's soundtrack isn't HD, it makes a significant improvement.

Wolf-garcia - One of my EE audio friends suggested that the pre-outs with the recievers volume set to 0 db might be a better way to go. His comment was "tape out would work but I think the impedance and signal voltage may be slightly different than an actual pre-amp output." I guess I'll have to try both and see what works best. I'm guess that both will work and I might not really be able to tell the difference.
I have pre-amp outputs available, the concern that I had was having two points of volume control. My EE buddy reminded me that I just needed to the the receiver volume at 0db and the input signal should effectly pass through without attenuation.
Well, I managed to get the on and off sequence backwards, but it seems to survive. I did get right at 3 hours of listening (not all 100% supervised) and plan to sleep for at least 3 hours so should be able to comply with that rule at least this time. An enjoyable evening of Christmas music.
Listening round 2 ended with the power going out. We will be gone most of the day so I just shut the power conditioner down until we get back.