Those amps are more for multizone applications. Typically, an amp like that would be paired with an in wall, ceiling or even an outdoor speaker. Its a good quality product, but I don't know if it would be the best choice for your Sonus Faber speakers in a main system. Before you invest any real money, maybe see if you can try it first with some lossless files on an iPod, or even a computer. Try to get an idea if it can approach what you are already using. Also, those type of amps sometimes have gain controls right on the amp. If so, just plug a CD player directly into it. Just be sure to have the gain all the way off at first and bring it up slowly until you reach a good listening volume.