The Marantz Melody units are extremely compatible as far as speakers are concerned. Due to the amplifier power, according to the manufacturer, floorstanders and compact speakers (also 4 Ohm) can be operated with this system without any problems. With the Melody Media MCR-611, the predecessor model of the M-CR612, my old B & W CDM 7 SE floor-standing speakers deliver a wonderful sound, and you can also turn up the volume quite a bit if necessary. In this respect, I would trust the manufacturer's specifications, because the M-CR412 also delivers 2x 60 watts into 6 ohms.