Ohm L Speaker "sony str de545" Questions

...sony STR-DE545. My speakers from my old receiver are from a htib sony from 2001. Link They are rated 4 ohm 100w speakers but the receiver is rated at 100w and 8 ohm per channel on center and rear ...

...Sony Receiver Model STR-DE545? look at your speaker wire there should be some marking the distinguishes each wire. You need to get this right make sure the negative or black color from the speaker is ...