I have the Fyne 500 series speaker , Very nice sounding build quality is one of best I have seen for the money. I have played them threw tube and S.S. amps with all excellent results . The music is full ,deep,and dynamic for a monitor . Set up properly away from walls and give them room . It plays all kind of music with expression and detail . I now have the Rega brio amp running threw Pandora and the Audio Hungary I-20 amp its just gets better . For the money can not go wrong they do like clean power to sound there best and good amount of break in time .