Demetrio
Yes, I was joshing you.

Most speakers will not sound warmer or cooler simply because you have changed amplifiers. Most speakers will continue sounding the way they sound irrespective of the amp you are using. If you have a hard-sounding speaker, you would usually do best by replacing it.

The one set of exceptions to the above rule that I know about are Magnepan speakers.

Magnepan speakers will indeed sound quite different with different amplifiers. Magnepans sound best with good (do not read 'expensive') tube amps, while a good Class A solid state amp (MF A2 or A220) can also be very satisfying when used with a Magnepan.