I drove many speakers over many years with an SA4. I loved it. A few years ago, I moved into a smaller home and listening room, which forced me to consolidate my amp, pre, phono pre and dac into a single integrated. I was devastated by the prospect, certain my audiofool life was over. But, it wasn’t! The Devialet 220 integrated is both more transparent and dynamic in my home than the SA4 amp, SA5000 pre (both with premium gold Alta Vista upgrades), and PS Audio Perfect Wave dac it replaces. I’m driving currently a pair of Reference 3A MM de Capo BEs with a REL sub. I never expected such fine performance from a digital amp.