Never Owned a Tube Amp and Want Advice


Hi All, 

I have never owned a tube amplifier before and am planning to purchase one with a minimum of 50 watts per channel to mate with 8 ohm 88 dbl speakers.

My hope is experienced audiogoners will share their expertise regarding how to approach this. While I realize listening is the best way to learn about sound and compatibility; I want to learn a better understanding about brands with less maintenance and longer tube life, how to decide between mono or stereo,can a newbie play with bias or is auto biasing a better first choice, etc.

I would also appreciate what to look for in selecting a used tube amp to identify one that might be in need of repair. For example, with solid state depending on the brand, capacitor replacement can be more of a concern. Any advice on what to look out for or ask about with used tube amps would be appreciated.

A big question I have is how to understand the relationship between power tubes like E34's, 120.s, etc. and, I guess the driver? tubes like 12au7's and 12at7's. That  is to ask which is more critical to the overall sound of the amp? FWIW, I routinely tube roll with my preamps.  

I 've read through a number of threads but maybe someone can point me to good ones I may have missed. 

Thanks for listening,

Dsper
dsper

Showing 1 response by daveyf

I own a tube amp and a ss amp. Swap them out to hear the differences and enjoy both greatly. Tube amps are more 'hands on' than ss amps IME. Tube amps also have a few idiosyncrasies that ss amps do not,IMO.
Firstly, what is not really mentioned here ( at least that I could find) is that tube amps are generally more costly to run. One has to budget for expected tube replacement. Also, typically IME the amps run hotter than ss amps. ( particularly Class D ss amps) So, if heat is a concern, and it should be in many parts of the world today, then this needs to be considered. Then we have the biasing scheme required by most tube amps...( unless they are self biasing, which is the way I would STRONGLY recommend you go). I used to own an incredible sounding tube amp, but the biasing protocols were bordering on criminal! This is less common today, but still something to be very much factored in. 
Lastly, expect a tube amp to require more warm-up than the typical ss amp. With a lot of tube amps one has to wait for the tubes to stabilize before listening to music, that generally is not a factor with ss amps. In case it sounds like i am down on tube designs, absolutely NOT, but one has to expect their 'requirements' to get the best sound. ( and that sound is one that I generally think sounds better than the best ss amps, at least that I have heard!).