2. amps-preamps
  3. 127327-23130

Tube Power Amp Suggestions

I have been looking for a tube power amp. Ideally I want to have about 40 to 70 watts output power, with sound qualities as close to a delicate SET amp as possible, with lots of details, fast, good tone (a tiny bit on the warm side) and imaging, yet with good bass and dynamic. Budget is about 10,000. Second-hand is fine. I know I am asking really too much and will probably get negative response because of this. I just want to get the best within my budget.    
      
My initial considerations are EAR 890 or EAR 861. What do you think?      
    
I heard people saying that push-pull amp can be better than SET if it is implemented well, but push-pull is more difficult to make than a SET amp.    
      
My speakers are measured 91db sensitivity, but it needs power to perform well. I have tried both a SET 300B XLS output at 13W and a push-pull EL34 at about 35W. My impression is as follow:            
      
- SET 300B XLS output at 13W: more delicate and smooth, better resolution and density, lack bass and dynamic       
- Push-pull EL34 at 35W: much more bass and dynamic, sounds a bit coarse, less 3-dimensional and delicate     
    
Thank you in advance for your input. 
   

bigdish
jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
There is currently a VAC Renaissance 70/70/ Mark III for sale on Audiogon. It is push-pull design using 300B output tubes, 65 wpc, asking $6,300.
I have no relation to the seller.

https://www.audiogon.com/listings/tube-vac-70-70-mark-3-stereo-power-amplifier-2016-12-02-amplifiers-92683-westminster-ca


mani-2
42 posts
 
With that budget you have access to a huge variety of amps, especially if you’re prepared to consider pre-owned. How about a set of Lamms? It’s true, at 91 dB your speakers are on the edge for 300Bs, but if it’s the SET sound you’re after, 845s might do fine. These MasterSound monos are Parallel Single Ended, but the sound characteristics are very similar to SET, and certainly worth considering if that's the type of sound you're after: https://www.audiogon.com/listings/tube-mastersound-845-monoblock-plus-see-photo-2016-11-30-amplifier...

It would probably help if you indicated the speakers you have; synergy being so important.
sbank's avatar
sbank
2,038 posts
 
The Lamms might not be powerful enough. The Atma M60s were one of the first I thought of. 
Dehavilland is known for more powerful set designs using a variety of tubes 845s, GM70s etc. They are exactly what you describe. Kara is a great resource, and super supportive. They aren't as well known as some brands, but well worthy of consideration.
IMHE, both of these will be a bit more dynamic with better extension at each end of the freq. spectrum than 300Bs that offer awesome mids and not quite so much otherwise.
The VAC 70/70 is a great amp, but personal priorities will really come into play here. Cheers,
Spencer  
wolf_garcia
4,650 posts
 
Cary monos, Cary S120II, ARC Ref 75…those are my fave "non-budget" amps that I would consider when I tire of my el cheapo Jolida 502p.
charles1dad's avatar
charles1dad
6,996 posts
 
Bigdish,
The EAR amps you’re interested in are very well regarded. Of the 2 and given your stated preferences I believe the EAR 861 (EL 519 strapped in triode) are likely closer to SET in character. The VAC REN 70/70 mentioned earlier is an excellent example of push pull 300b topology. A very similar option is the Canary 339, 300b push pull 50 watts per channel.

A fine SET amplifier that meets your power requirements is the Line Magnetic 508ia which is 40 watts per channel via 805 tubes. I really suspect their 219ia SET 24 watts using 845 tubes would be an option as well. This is a massively built true dual mono amplifier that uses the 300b as the driver tube for the 845 output tube. Both these amps have earned terrific owners word of mouth.

It would be very helpful to know what speakers you have. All 91 db sensitivity speakers aren’t equal when it comes to ease of load characteristics (impedance).
Charles
More to discover