Atma-Sphere M-60
additionally, ZERO autoformers probably needed for your 6ohm speakers
additionally, ZERO autoformers probably needed for your 6ohm speakers
Refined 30-60 watt Tube amp
If you're going with 94db+ speakers, I would strongly recommend 300SE type amp. For SOTA design, you can start by looking at something like Border Patrol SE 300B. You can also have custom amp made from Eletra Print ( who also designed the Welbornelabs DRD amps ) This is one great combo 300B SE + hi efficiency. Some folks think this combo is the music in its purist form. IMHO, even with a cheap EL84 PP, the sonic signature is already better than most of the high power setup. Good luck |
How about the Kara Chafee designed deHavilland amps? deHavilland Website FWIW, I definitely liked what I heard from the GM70. I am trying to think of another design I have heard good things about, but am drawing a blank at the moment. BTW, how does an amp get any more refined than an Atma-Sphere? With God as my witness, and I don't say that lightly, the first time I heard the M-60 I had the same feeling I had when I met my wife. |
45 watts on 94dB speakers is a lot of power. I know they are 6 ohm (? nominal), but damn. That's a lotta power. There are lots of low-medium power (not flea power) SETs that sound more power than they are. It might be due to the serious iron a lot of them have. Totally iron-fist-with-a-velvet-glove-type jobs. |
You can find information on the Viva line at Walker Audio. I have no interest in the company. They use a variety of output tubes but the 845 tube Aurora is the most powerful at only 36wpc, however be careful of simple power ratings. Its a very expensive amp. If you've got that kind of money to burn check out the Cary 211. Refined is a tough adjective to define. I am surprised that you thought the BAT was "too" powerful, I like their sound. If you meant too full sounding then consider an SET or OTL as mentioned. I agree that the Atmasphere M60 is about as pure as it gets. The possibilities are innumerable- good luck |
You might look at the Canary line of 300B p-p amps, especially the CA-301 stereo amp. I have the big brother monos, the CA-339, and I'm extremely impressed. 22 wpc, but the lower output impedance means thay'll drive 6 ohm speakers better than your average SET. The dynamics and purity of tone of these amps is really something to hear. |
The VAC 30/30, purchased used, would likely be a smart choice. Top-notch build quality, very sophisticated sound, and far more powerful than the 32 watt/channel rating would suggest (it can drive a lot of speakers). The use of long-life 300B output tubes and automatic biasing of the tubes make it very easy to own (just turn it on and off -- that's it). They are available used for a fraction of their very high new price because people don't know how good or how potent the amp is. Good luck. |