I also agree to what Blackie wrote.How can one know that an
amp doesn´t change the signal of recorded music?
What will the comparison be,no amp at all? But then there will be no sound´....
In reality, all components in the reproduction chain seems
to affect the sound of the reproduction.And while some component´s contribution will probably be so small that
we can ignore them (at least at thise time of development),
all amps seems to have some sort of sonic signature, and they do interact with the preamps as well as the loudspekers we use!
I´ve heard the Levinsson 334 a few times, with Revel speakers,Levinson CDP and preamp, and to my ears that system was a rather easy-listening system,althought it didn´t got up so much of details.Dynamics was good,without
beeing outstanding.At the same time, there may be systems
that are slightly more true to the reality.But I can´t say
how a Levinson amp sound by itself, and Levinson also have their reference line.