You certainly need a beolink passive, MLC2P or similar amp. I tried powering up the cona without a dedicated amp and was not happy.
It will make a difference certainly.
Beovox RL 60.2, RL 6000, S45-2, CX 50, Cona, Beolink Passive, MCL2P, BM4500, Beosound 1, Beocenter 2500, Beolab 2500, Besound 4000, Beolab 4000, Beocom 6000, A8, Beosystem 1