what is the different between hot tube amp,solid state amp and all transistors amp and which sound better ?

Answer 1

RunningMan summed it up pretty good.

For more information on the subject.
http://en.wikipedia.org/wiki/Valve_sound

"It is important to distinguish between different vs. 'better'. There is no one right answer, and technologies that have advantages in some ares have weaknesses in others, and vice versa. Today, designers can produce good, indeed excellent sounding amplifiers (and equally poor designs) using both valve and transistor gain devices, and the sonic characteristics are not so clearly or universally distinct as they once were."

Answer 2

I personally like the warmth of the tube amp. It gives a classic sound. A lot of people use transistor amps, especially because they are a heck of a lot cheaper. I know that you can also "simulate" the warmth of the tube amp by running through a pedal to do so and then into a transistor amp. Hope this helps. nickguitarguy

Answer 3

Tube amps are pretty rare nowadays, and are found only in the very "high end" audio units. Some people feel that tube amps have a "warmer" sound, but spec wise, nothing can beat the low distortion levels of a transistor amp.

Answer 4

transistor and solid state are the same thing and reproduce true. Tube types ie Vacume tube add harmonics to the output, which some say gives the music a richer or fuller sound