2. amps-preamps
  3. 1118275078

correct way to turn off tube preamp

I recently purchased a tube preamp. My other equipment is SS which I leave on 24/7. From what I have read I don't want to leave the pre on all the time. When done listening is it ok to put the amp in standby mode, then turn off the pre?,, or should I turn off the pre--leaving the amp on and then going to standby mode on the amp. When I do the latter I get a very samll 'thump' heard through the speakers. Thank you.
classical1

Showing 2 responses by armstrod

armstrod
618 posts
 
I'm on the lower end but am also incredibly pleased with my Wright Sound WLA12A and my modded Hafler DH-200. I leave the Hafler, my tuner, and my CD player on 24/7, and none generate any significant heat, nor do they draw very much power at idle. They are way more stable being left on all the time. The Wright Sound, however, gets turned off after every listening session. Since it's tube rectified, the turn on and off is very soft, and causes no thump or other noise in the system, even if I forget to mute. In this regard, it's way easier on my system than any of my SS preamps, and sounds great to boot!
armstrod
618 posts
 
After reading here and in a couple other threads about leaving small-signal tube gear on 24/7, I decided to write the manufacturer about my Wright Sound WLA12A. Here's what George Wright said:

Dear David,

I have worked in the support field for a number of years and serviced tube equipment that ran 24/7, we always had to change out tubes every 6 months because the cathodes would be used up. I suggest that once the equipment is baked in, about 50 hours, to turn off when not in use to saved tube life.

Best,
George

George has been around tubes a long time, so I, for one, would tend to give his opinions careful consideration.

I'll continue to turn mine off when not in use.

David
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