12ax7's to roll

Some 12AX7 and 12AU7s can last up to 10,000 hours. As has been said, Telefunkens are known for long life. Some tubes were advertised as 10,000 hour tubes such as the Mullard 10M line. I think that 3-5,000 hours is more realistic.

Small signal tubes, like any tube, can conk out at any time. Most won't though. They more often become noisy or microphonic. That's part of the crapshoot. It's always a good idea to have a spare set of tubes in case this happens. A good dealer can advise you on this topic as well.

As other's have posted here, and I'm appreciative of their comments, each tube make and vintage will usually supply a different flavor.

As for hours? outside of the Amperex & tungsol tubes rolling in new ones every other year of usage is a very nice thing. Not necessarily a needed thing, just a nice thing. Fresh tubes from a great vendor whose abilities to test thoroughly each tube sold is imperitive. i'm not keen on Audio tubes, formerly Brent Jessie tubes... BTW, Why the name change?

FYI ... His return policy bares greater investigation.

Andy Bowman of VINTAGE TUBES isn't the cheapest place to buy tubes, but I've never had to return any to him either. that's very important. Very. I'm sure too, if one did fail outright soon after receipt Andy would take care of it. Great guy, and excellent products.

Superwolf. Yes, the Rogue did tame the speakers. Enough so that I don't even recognize them anymore. It's so nice to not have to worry about it any longer. Now I'm able to enjoy listening and researching new music.

Somec59. Your post made me very happy. To know that someone prefers tubes that cost $35/pair more than NOS tubes at $200/pair is very exciting indeed.

I really appreciate the information you have all provided me. I'm also thankful for this website. I don't think I'd be enjoying music the way I am right now if it wasn't for this forum. Just 6 months ago I preferred to listen to music in my 4 Runner over my brand new amp/preamp. I never imagined being able to cure all my problems with one web site.

Donjr: The 35.00 cost for a pair of new ElectroHarmonic 12ax7 tubes covers the cost of manufacturing and distributing at 2009 prices. At times I've bought expensive NOS tubes which invariably helped maintain the high prices of NOS tubes. There are costs involved with finding, buying and shipping NOS tubes and providing a luxury service to me, but I would like to know what a pair of Tele's or Mullards cost 40-50 years ago.