Class A Amp

Here is a amp that can do it and heat the room up as well:
Atmasphere's MA3;specs are:
500 watts/channel, 2-16 ohms
Bandwidth 1-100KHz within .5 db
IM distortion: 0.04% at full power
Input impedance 100K single-ended, 200K balanced, selectable to 600 ohms
Output section risetime 600V/microsecond
1/4 Farad of power storage capacity per channel- the most of any production amplifier!.
The power supply chassis is 21" wide, 34" long and 12.5" high. Weight: 152 lbs.
The amplifier chassis is 21" wide, 31.5" long and 15" high. Weight: 80 lbs.
What do you think???
Got a american express black card??

What's the budget?

For Thiel, think Pass, BAT, Mcintosh, etc. Solid state that has some emotion and will not overdrive the tweeters. Agree with the need for power, especially if the space is large.

Pass x600.5 does 600 into 8, and 900 into 4. Something like the first 80 is class A (for delicate passages), and then it switches to AB (for loud passages to keep it clear and delineated).

Rob

Rleff comes closest to what you want with his recommendation of the Atma-Sphere. Keep in mind that Rleff discribes only one channel. Check it out on atma-sphere.com, it's really a product to behold!

What 2.8 Ohm load speaker specifically?

If the load varies widely by frequency around a 2.8 ohm average spec, then I'm thinking any tube amp, even the Atmasphere, may not be ideal.

I'm thinking one of the other Class A SS recommendations, assuming they double output from 8 into 4 and 2 ohms, or the Rowland or Bel Canto Class Ds that do same would be better.

Most class A amps go to class A/B after 20-60 watts. They simply can't dissipate that much power when idle. I'd go with a moscode bridged mono.