Tube doesn't mean it is slow. It is very much depends on the sound tuning and inner structure of the amp.
Such as Schiit tube amp is known as US sound, which is very powerful and suitable for fast movement songs, definitely not soft. Can check out the reviews.
Besides that, most of the top range desktop amp is actually using tubes. But it doesn't mean they all suitable for slow, relaxing music.
A lot of people also thought that tube amp or tube DAC is warm and thick sound. In fact, DAC like Aune T1, Musical paradise Mp-D1 is very clean sound and definitely not slow.
Solid state amp can also be thick and warm.
The misconception may due to tube amp is more antique products. Sound tuning from the last century, is more to thick, warm, and with sweet sensation. Just like the sound of the vintage CD players.
Some of the tube amps are still using this kind of sound tuning, so a lot of people thought that products with tubes must be warm, thick and slow.
But look at all the vintage cd players, they are all solid state and not tubes.
This post has been edited by liquidgal: Feb 16 2014, 06:05 PM