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 2 responses by pkatsuleas

Another great thread, very informative! 

OP, what is your preamp?  Didn't see that mentioned anywhere.  My suggestion would be to get yourself a good tube pre and see how you like it with your DNA 500.  I'm using a DNA .5 (100 watts) with a Rogue Perseus tube pre and very happy for now.  Started small and cheap with a Schiit Saga tube pre which sounded good but knew I could do better.  As you've probably read here and elsewhere this could be the best of both worlds for you and a worry free entry into tubes (no biasing, etc.).   

I do have a Jolida 502b tube integrated (60 watts, Gold Lion KT88) that I used for years and still do occasionally.  The Jolida definitely gives you more of that "tube magic" but the .5/Perseus combo gives better bass control and punch.  

BTW, my speakers are old Snell Type D (rated at 87 dB and 5 ohms) and  not quite so old Gallo Ref 3.1 (88dB, 4 - 8 ohms?).  The Jolida powers them both quite satisfactorily for me in the 80 - 90 dB range.  Although, the Gallos do seem to play just a bit louder/cleaner before any hint of distortion.  I am very interested in trying some speakers over 90 dB with the Jolida.  Unfortunately, can't afford any Tannoys right now!  ;-}

Keep us posted