Tube preamp reliability vs SS?


I am considering buying a Conrad Johnson classic 2se pre or a used McCormack LD-2 preamp. 

 I have never used a tube pre, and am curious as to the reliability of the tube, I like to be able to turn it on, maybe wait 30 min for warm up before jamming tunes.  This is fine, my concern is the reliability of the tube, how long will it last?, also, is it a pain to change when it goes bad? Can I change myself, or must I send to factory just for this small tube? 

  • Would the the action of me putting in the new tube void any warranty, not that 3 years is long anyway  when it comes to warranties. 
arcticdeth

Showing 3 responses by kijanki

Conrad Johnson has three small tubes on the sockets.  Replacement is as simple as pulling one and, after replacing damping rings, pushing new one paying attention to orientation.  5 min job.  When I was young, we had TV full of small tubes.  First one was replaced at about 10 years.  I would base decision only on the sound in my system and the reputation of the company.  SS (even SMT) can be as unreliable - it depends on design and quality of the parts.
Musicians love tube amps since tubes are easy to replace. Semiconductors failure is harder to diagnose and usually require professional repair.
Tubegroover, That’s what I heard from the few of them. Nice distortion (crunch) is another reason. It seems logical to me that tech person in the band (often one of musicians) can easily bring amp back to life by simply replacing a tube, but SS amp would be practically irreparable on the road. Any performing musicians here?

Yes, audio amps and guitars amps are different but ability to fix them easily is always appreciated.