I would like to try and add the two speakers of my Sony MHC-C90 mini hi-fi, that was bought 10 years ago, to my Onkyo HT-S650 htib. I will be connecting them as Speaker-B. Specs: Rated Impedance: 6 ohm Max Input power: 200w I think these speaker are 3-way. Are they safe to add these speakers with my HTIB? Will there any damage occur to my receiver or the speakers?