I know their F2a push pull monos very well and they are fantastic. A good buddy of mine has a pair he uses with Daedalus Ulysses speakers to great effect. I also tried them with Zu speakers and the amps are great. They do the delicate thing as well are rock out and are supremely musical.
Based on this experience that same friend and I ordered two of their two box preamplifiers (one for each of us) but ended up returning them. The phono section of the preamps were phenomenal but the linestage section was not what we had hoped for.
