Hi - I've got a Denon RCD N10 streamer (rated 4ohm) and would like to get some vintage B&W DM602 speakers but they are rated 8ohm. Will I really notice any difference in performance, sound quality or volume? I'm currently using some 6ohm Wharfedale speakers which sound fine but they're almost at the end of the life. Any advice on the confusing world of ohm matching would be appreciated. Am looking to buy some old fashioned large speakers with hefty bass hence the DM602 but any advice would be gratefully received.