Leave it on or turn it off?

Unless you have surge protector. But still every time the hair dryer is turned on upstairsm the loud humming noise from turned on amp scares the hell out of me. I turned my stuff on about 1 hr before listening session.

DWPC,
I think that as long as it is plugged directly into the wall and not through a power conditioner, we all run that risk - on or off. It's those dang wires!

Spectral recommends explicitly that their DMA-360 amps not be left on unattended for long periods, because of potential speaker damage during brown-outs or power outs. Check with Classe on their recommendations for their amps.
Dwpc, high quality surge protection should help, but there are no guarantees with lightening strikes.

Glen, I think the best solution is to have an amp that has a standby mode. My Krell FBP300 only needs 2-3 songs before it starts to sound its best because the main circuits that affect sound remain powered in standby. The other less important areas are powered off. I think it uses about 40 Watts in standby, certainly enough to add a few dollars to your monthly electric bill but only 25% of the power it would use powered up.

By the way, leave it off for a while. With the money you save on electricity you can upgrade to the MIT digital interconnect that you want!!

Gregg

Gregg c, As you well know I am winning at that auction:~)

Bmpnyc, Your not the first to ask me that. I don't have any Classe amp manuals handy but I could swear they say 300hrs warm up time. I sure wish they had a stand-by mode on these amps. I would love to keep it warm and not have to turn it on and off all the time. The amp gives me this vibe like it's pissed every time I turn it back on. Can't figure out the pops and klinks. Is it asking me for classical music or something? Does anyone else experience strange noises on intial start up? (first 20 minutes)