Oxymoron: High powered tube amps that stay cool

You may want to check into some of the newer "Green" SS "Class A" amps coming out of China. Their circuit designs are actually extremely effective in terms of efficiency, yet still provide true "Non-Switching" Class A performance.

I still haven't found a Class A amplifier that runs as hot as tubes. I've been experimenting and auditioning Chinese gear as of late. I'm extremely impressed.

If they continue to produce the quality they are presently producing, many manufacturers are going to end up behind the eight ball because the Chinese gear is beautiful, well built, dependable and sounds absolutely wonderful.

A great example is what Dussun is doing with their "Hyper Class A" variable bias circuitry. It's my understanding that they will be releasing a Pre/Power with Stand alone power supplies with 150 watts class A power.

At present, they are utilizing similar circuitry in their V8 integrated. I haven't heard it but it's my understanding that it's a wonderful sounding amp that is extremely efficient. However, I have yet to determine if "Hyper Class A" is a true class A design due to it's level of efficiency. Ping from AAA audio could provide you much mre info than I I'm sure.

http://www.aaa-audio.com/index-products-dussun.htm

Xindak also offers an extremely efficient Class A amp with their XA-6800 SE integrated amp. You'll be seeing many more designs like these coming from China.

http://www.xindak.com/english/products/showditail.asp?id=251

Funny that a country with the absolute worst air quality is focusing on "Green" amp designs.